boards: Convert 96b_aerocore2 to HWM v2

Port the board to HWMv2.

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

boards/boards_legacy/arm/96b_aerocore2/Kconfig.board

@@ -1,6 +0,0 @@
-#  Copyright (c) 2020 Linaro Limited
-#  SPDX-License-Identifier: Apache-2.0
-
-config BOARD_96B_AEROCORE2
-	bool "96Boards AEROCORE2 (STM32F427)"
-	depends on SOC_STM32F427XX

boards/boards_legacy/arm/96b_aerocore2/Kconfig.defconfig

@@ -1,9 +0,0 @@
-#  Copyright (c) 2020 Linaro Limited
-#  SPDX-License-Identifier: Apache-2.0
-
-if BOARD_96B_AEROCORE2
-
-config BOARD
-	default "96b_aerocore2"
-
-endif # BOARD_96B_AEROCORE2

boards/gumstix/96b_aerocore2/96b_aerocore2_defconfig

@@ -1,9 +1,6 @@
 # Copyright (c) 2020 Linaro Limited
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32F4X=y
-CONFIG_SOC_STM32F427XX=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y
 

boards/gumstix/96b_aerocore2/Kconfig.96b_aerocore2

@@ -0,0 +1,5 @@
+#  Copyright (c) 2020 Linaro Limited
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_96B_AEROCORE2
+	select SOC_STM32F427XX

boards/gumstix/96b_aerocore2/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: 96b_aerocore2
+  vendor: gumstix
+  socs:
+    - name: stm32f427xx