boards: riscv: xiao_esp32c3: Convert to v2

Converts the board to hwmv2

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>

boards/boards_legacy/riscv/xiao_esp32c3/Kconfig.board

@@ -1,10 +0,0 @@
-# Copyright 2022 Google LLC
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_XIAO_ESP32C3
-	bool "XIAO ESP32C3 Board"
-	depends on SOC_SERIES_ESP32C3
-
-choice SOC_PART_NUMBER
-	default SOC_ESP32C3_FX4
-endchoice

boards/seeed/xiao_esp32c3/Kconfig.defconfig

@@ -1,10 +1,6 @@
 # Copyright 2022 Google LLC
 # SPDX-License-Identifier: Apache-2.0
 
-config BOARD
-	default "xiao_esp32c3"
-	depends on BOARD_XIAO_ESP32C3
-
 config HEAP_MEM_POOL_ADD_SIZE_BOARD
 	int
 	default 65535 if WIFI && BT

boards/seeed/xiao_esp32c3/Kconfig.xiao_esp32c3

@@ -0,0 +1,5 @@
+# Copyright 2022 Google LLC
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_XIAO_ESP32C3
+	select SOC_ESP32C3_FX4

boards/seeed/xiao_esp32c3/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: xiao_esp32c3
+  vendor: seeed
+  socs:
+  - name: esp32c3

boards/seeed/xiao_esp32c3/doc/index.rst

@@ -132,9 +132,9 @@ Zephyr build. Output is structured by the domain subdirectories:
 
   build/
   ├── hello_world
-  │   └── zephyr
+  │   └── zephyr
-  │       ├── zephyr.elf
+  │       ├── zephyr.elf
-  │       └── zephyr.bin
+  │       └── zephyr.bin
   ├── mcuboot
   │    └── zephyr
   │       ├── zephyr.elf

boards/seeed/xiao_esp32c3/xiao_esp32c3_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_BOARD_XIAO_ESP32C3=y
-CONFIG_SOC_SERIES_ESP32C3=y
-
 CONFIG_MAIN_STACK_SIZE=2048
 
 CONFIG_CONSOLE=y