fix(board): Correct board.yml structure and set console to uart0

boards/dfrobot/firebeetle2_esp32c6/board.yml

@@ -1,52 +1,4 @@
 board:
   name: firebeetle2_esp32c6
-  full_name: FireBeetle 2 ESP32-C6
-  vendor: dfrobot
   socs:
   - name: esp32c6
-    variants:
-    - name: firebeetle2_esp32c6_hpcore
-      board_name: firebeetle2_esp32c6_hpcore
-      meta:
-        name: FireBeetle 2 ESP32-C6 (HP-Core)
-        type: mcu
-        arch: riscv
-        toolchain:
-          - zephyr
-          - gnuarmemb
-          - xtools
-        supported:
-          - uart
-          - gpio
-          - i2c
-          - spi
-          - wifi
-          - ble
-        ram: 512
-        flash: 4096
-        testing:
-          ignore_tags:
-            - net
-            - bluetooth
-    - name: firebeetle2_esp32c6_lpcore
-      board_name: firebeetle2_esp32c6_lpcore
-      meta:
-        name: FireBeetle 2 ESP32-C6 (LP-Core)
-        type: mcu
-        arch: riscv
-        toolchain:
-          - zephyr
-          - gnuarmemb
-          - xtools
-        supported:
-          - uart
-          - gpio
-          - i2c
-          - spi
-        ram: 16
-        flash: 0
-        testing:
-          ignore_tags:
-            - net
-            - bluetooth
-  default_variant: firebeetle2_esp32c6_hpcore

boards/dfrobot/firebeetle2_esp32c6/firebeetle2_esp32c6_hpcore.dts

@@ -17,8 +17,8 @@
 
 	chosen {
 		zephyr,sram = &sramhp;
-		zephyr,console = &usb_serial;
-		zephyr,shell-uart = &usb_serial;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
 		zephyr,flash = &flash0;
 		zephyr,code-partition = &slot0_partition;
 	};