boards: custom_plank: port to HWMv2

Port the custom_plank example out-of-tree board to HWMv2.

Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>

boards/arm/custom_plank/Kconfig.defconfig

@@ -1,9 +0,0 @@
-# Copyright (c) 2021 Nordic Semiconductor ASA
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_CUSTOM_PLANK
-
-config BOARD
-	default "custom_plank"
-
-endif # BOARD_CUSTOM_PLANK

boards/vendor/custom_plank/Kconfig.custom_plank

@@ -2,5 +2,4 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_CUSTOM_PLANK
-	bool "Custom Plank Board"
-	depends on SOC_NRF52840_QIAA
+	select SOC_NRF52840_QIAA

boards/vendor/custom_plank/board.yml

@@ -0,0 +1,8 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+board:
+  name: custom_plank
+  vendor: vendor
+  socs:
+    - name: nrf52840

boards/vendor/custom_plank/custom_plank.yaml

@@ -3,6 +3,7 @@
 
 identifier: custom_plank
 name: Custom-Plank
+vendor: vendor
 type: mcu
 arch: arm
 ram: 256

boards/vendor/custom_plank/custom_plank_defconfig

@@ -1,10 +1,6 @@
 # Copyright (c) 2021 Nordic Semiconductor ASA
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_NRF52X=y
-CONFIG_SOC_NRF52840_QIAA=y
-CONFIG_BOARD_CUSTOM_PLANK=y
-
 CONFIG_ARM_MPU=y
 CONFIG_HW_STACK_PROTECTION=y