boards: Convert 96b_argonkey to HWM v2

Port the board to HWMv2.

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

boards/96boards/96b_argonkey/96b_argonkey_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32F4X=y
-CONFIG_SOC_STM32F412CX=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y
 

boards/96boards/96b_argonkey/Kconfig.96b_argonkey

@@ -1,8 +1,5 @@
-# 96Boards Argonkey Board Configuration
-
 # Copyright (c) 2018 STMicroelectronics
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_96B_ARGONKEY
-	bool "96Boards Argonkey"
-	depends on SOC_STM32F412CX
+	select SOC_STM32F412CX

boards/96boards/96b_argonkey/Kconfig.defconfig

@@ -5,9 +5,6 @@
 
 if BOARD_96B_ARGONKEY
 
-config BOARD
-	default "96b_argonkey"
-
 if LSM6DSL
 
 choice LSM6DSL_TRIGGER_MODE

boards/96boards/96b_argonkey/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: 96b_argonkey
+  vendor: 96boards
+  socs:
+    - name: stm32f412cx