hack to get imx-boot building again

conf/projects/var-som-mx8m-nano/config.conf

@@ -58,3 +58,9 @@ IMG_VERSION = "0.0.1"
 # For running oe-selftest uncomment below lines
 #USER_CLASSES:remove = "buildhistory"
 #PRSERV_HOST = ""
+
+# the following is a hack to trick the imx-boot compile_mx8m function
+# as Variscite is overriding do_compile but not setting the following var.
+# This is likely a mismatch between the version of meta-freescale we are
+# using vs Variscite
+UBOOT_DTB_NAME_EXTRA = "imx8mn-var-som-symphony.dtb"