Cleanup of typos and inconsistencies in common.xml (mavlink#2044)

* Correct typo: telemtry -> telemetry

* Use consistent casing of "RC"

* Correct typo: permant -> permanent

* Correct typo: infinetely -> infinitely

* Correct typo: presedence -> precedence

* Correct typo: irreversably -> irreversibly

* Correct typo: sytstem -> system

message_definitions/v1.0/common.xml

@@ -23,7 +23,7 @@
       </entry>
     </enum>
     <enum name="HL_FAILURE_FLAG" bitmask="true">
-      <description>Flags to report failure cases over the high latency telemtry.</description>
+      <description>Flags to report failure cases over the high latency telemetry.</description>
       <entry value="1" name="HL_FAILURE_FLAG_GPS">
         <description>GPS failure.</description>
       </entry>
@@ -49,7 +49,7 @@
         <description>Battery failure/critical low battery.</description>
       </entry>
       <entry value="256" name="HL_FAILURE_FLAG_RC_RECEIVER">
-        <description>RC receiver failure/no rc connection.</description>
+        <description>RC receiver failure/no RC connection.</description>
       </entry>
       <entry value="512" name="HL_FAILURE_FLAG_OFFBOARD_LINK">
         <description>Offboard link failure.</description>
@@ -170,7 +170,7 @@
         <description>0x8000 motor outputs / control</description>
       </entry>
       <entry value="65536" name="MAV_SYS_STATUS_SENSOR_RC_RECEIVER">
-        <description>0x10000 rc receiver</description>
+        <description>0x10000 RC receiver</description>
       </entry>
       <entry value="131072" name="MAV_SYS_STATUS_SENSOR_3D_GYRO2">
         <description>0x20000 2nd 3D gyro</description>
@@ -403,7 +403,7 @@
       <deprecated since="2020-01" replaced_by="GIMBAL_MANAGER_FLAGS"/>
       <description>Enumeration of possible mount operation modes. This message is used by obsolete/deprecated gimbal messages.</description>
       <entry value="0" name="MAV_MOUNT_MODE_RETRACT">
-        <description>Load and keep safe position (Roll,Pitch,Yaw) from permant memory and stop stabilization</description>
+        <description>Load and keep safe position (Roll,Pitch,Yaw) from permanent memory and stop stabilization</description>
       </entry>
       <entry value="1" name="MAV_MOUNT_MODE_NEUTRAL">
         <description>Load and keep neutral position (Roll,Pitch,Yaw) from permanent memory.</description>
@@ -460,7 +460,7 @@
         <description>Gimbal device supports locking to an absolute heading, i.e., yaw angle relative to North (earth frame, often this is an option available).</description>
       </entry>
       <entry value="2048" name="GIMBAL_DEVICE_CAP_FLAGS_SUPPORTS_INFINITE_YAW">
-        <description>Gimbal device supports yawing/panning infinetely (e.g. using slip disk).</description>
+        <description>Gimbal device supports yawing/panning infinitely (e.g. using slip disk).</description>
       </entry>
       <entry value="4096" name="GIMBAL_DEVICE_CAP_FLAGS_SUPPORTS_YAW_IN_EARTH_FRAME">
         <description>Gimbal device supports yaw angles and angular velocities relative to North (earth frame). This usually requires support by an autopilot via AUTOPILOT_STATE_FOR_GIMBAL_DEVICE. Support can go on and off during runtime, which is reported by the flag GIMBAL_DEVICE_FLAGS_CAN_ACCEPT_YAW_IN_EARTH_FRAME.</description>
@@ -523,7 +523,7 @@
     <enum name="GIMBAL_DEVICE_FLAGS" bitmask="true">
       <description>Flags for gimbal device (lower level) operation.</description>
       <entry value="1" name="GIMBAL_DEVICE_FLAGS_RETRACT">
-        <description>Set to retracted safe position (no stabilization), takes presedence over all other flags.</description>
+        <description>Set to retracted safe position (no stabilization), takes precedence over all other flags.</description>
       </entry>
       <entry value="2" name="GIMBAL_DEVICE_FLAGS_NEUTRAL">
         <description>Set to neutral/default position, taking precedence over all other flags except RETRACT. Neutral is commonly forward-facing and horizontal (roll=pitch=yaw=0) but may be any orientation.</description>
@@ -1475,7 +1475,7 @@
       </entry>
       <entry value="185" name="MAV_CMD_DO_FLIGHTTERMINATION" hasLocation="false" isDestination="false">
         <description>Terminate flight immediately.
-          Flight termination immediately and irreversably terminates the current flight, returning the vehicle to ground.
+          Flight termination immediately and irreversibly terminates the current flight, returning the vehicle to ground.
           The vehicle will ignore RC or other input until it has been power-cycled.
           Termination may trigger safety measures, including: disabling motors and deployment of parachute on multicopters, and setting flight surfaces to initiate a landing pattern on fixed-wing).
           On multicopters without a parachute it may trigger a crash landing.
@@ -1951,7 +1951,7 @@
       <entry value="405" name="MAV_CMD_ILLUMINATOR_ON_OFF" hasLocation="false" isDestination="false">
         <wip/>
         <!-- This message is work-in-progress and it can therefore change. It should NOT be used in stable production environments. -->
-        <description>Turns illuminators ON/OFF. An illuminator is a light source that is used for lighting up dark areas external to the sytstem: e.g. a torch or searchlight (as opposed to a light source for illuminating the system itself, e.g. an indicator light).</description>
+        <description>Turns illuminators ON/OFF. An illuminator is a light source that is used for lighting up dark areas external to the system: e.g. a torch or searchlight (as opposed to a light source for illuminating the system itself, e.g. an indicator light).</description>
         <param index="1" label="Enable" minValue="0" maxValue="1" increment="1">0: Illuminators OFF, 1: Illuminators ON</param>
       </entry>
       <entry value="410" name="MAV_CMD_GET_HOME_POSITION" hasLocation="false" isDestination="false">