boards: Convert google_dragonclaw to HWM v2

Port the board to HWMv2.

Signed-off-by: Abderrahmane Jarmouni <abderrahmane.jarmouni-ext@st.com>

boards/boards_legacy/arm/google_dragonclaw/Kconfig.defconfig

@@ -1,9 +0,0 @@
-# Copyright (c) 2022 Google LLC
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_GOOGLE_DRAGONCLAW
-
-config BOARD
-	default "google_dragonclaw"
-
-endif # BOARD_GOOGLE_DRAGONCLAW

boards/google/google_dragonclaw/Kconfig.google_dragonclaw

@@ -2,5 +2,4 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_GOOGLE_DRAGONCLAW
-	bool "Google Dragonclaw Development Board"
-	depends on SOC_STM32F412CX
+	select SOC_STM32F412CX

boards/google/google_dragonclaw/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: google_dragonclaw
+  vendor: google
+  socs:
+    - name: stm32f412zx

boards/google/google_dragonclaw/google_dragonclaw_defconfig

@@ -1,10 +1,6 @@
 # Copyright (c) 2022 Google Inc
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32F4X=y
-CONFIG_SOC_STM32F412CX=y
-CONFIG_BOARD_GOOGLE_DRAGONCLAW=y
-
 # Serial Drivers
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y