Default interface NULL for esp32

[HimanshuSourav]

built and flashed successfully for esp32_wroom target and when booting, following error seen on console

I (31) boot: ESP-IDF 67fa60bdff 2nd stage bootloader
I (31) boot: compile time 23:42:49
I (31) boot: chip revision: 3
I (34) boot_comm: chip revision: 3, min. bootloader chip revision: 0
I (41) boot.esp32: SPI Speed : 40MHz
I (46) boot.esp32: SPI Mode : DIO
I (50) boot.esp32: SPI Flash Size : 4MB
I (55) boot: Enabling RNG early entropy source...
I (60) boot: Partition Table:
I (64) boot: ## Label Usage Type ST Offset Length
I (71) boot: 0 nvs WiFi data 01 02 00009000 00006000
I (79) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (86) boot: 2 factory factory app 00 00 00010000 00100000
I (94) boot: End of partition table
I (98) boot_comm: chip revision: 3, min. application chip revision: 0
I (105) esp_image: segment 0: paddr=00010020 vaddr=00000020 size=0001ch ( 28)
I (113) esp_image: segment 1: paddr=00010044 vaddr=3ffb0000 size=00710h ( 1808) load
I (122) esp_image: segment 2: paddr=0001075c vaddr=3ffb0710 size=00378h ( 888) load
I (130) esp_image: segment 3: paddr=00010adc vaddr=40080000 size=03c94h ( 15508) load
I (145) esp_image: segment 4: paddr=00014778 vaddr=00000000 size=0b8c0h ( 47296)
I (164) esp_image: segment 5: paddr=00020040 vaddr=3f400040 size=0235ch ( 9052) map
I (168) esp_image: segment 6: paddr=000223a4 vaddr=00000000 size=0dc74h ( 56436)
I (190) esp_image: segment 7: paddr=00030020 vaddr=400d0020 size=19030h (102448) map
I (230) boot: Loaded app from partition at offset 0x10000
I (230) boot: Disabling RNG early entropy source...
*** Booting Zephyr OS build zephyr-v3.5.0-4583-g6df6935b674c ***
WiFi Example
Board: esp32_devkitc_wroom
Connecting to SSID: test_ap
wifi_connect: getting the interface

Backtrace:0x400d5c8d:0x3ffe7460 0x400d0e05:0x3ffe7480 0x400d0ead:0x3ffe74d0 0x400810f7:0x3ffe7500 0x400d129f:0x3ffe7520
0x400d5c8d: wifi_connect at C:/Users/himan/zephyrproject/zephyr/subsys/net/l2/wifi/wifi_mgmt.c:260

0x400d0e05: wifi_connect at C:/Users/himan/zephyrproject/zephyr/samples/Zephyr_WiFi-main/src/wifi.c:124

0x400d0ead: main at C:/Users/himan/zephyrproject/zephyr/samples/Zephyr_WiFi-main/src/wifi.c:176

0x400810f7: bg_thread_main at C:/Users/himan/zephyrproject/zephyr/kernel/init.c:371

0x400d129f: z_thread_entry at C:/Users/himan/zephyrproject/zephyr/lib/os/thread_entry.c:48

edit: the error log for correct and default ssid is same.