boards: Convert stm32wb5mmg to HWM v2

Port the board to HWMv2.

Signed-off-by: Guillaume Gautier <guillaume.gautier-ext@st.com>

boards/boards_legacy/arm/stm32wb5mmg/Kconfig.defconfig

@@ -1,16 +0,0 @@
-# STM32WB5MMG Bluetooth module board configuration
-
-# Copyright (c) 2024 Javad Rahimipetroudi <javad.rahimipetroudi@mind.be>
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_STM32WB5MMG
-
-config BOARD
-	default "stm32wb5mmg"
-
-choice BT_HCI_BUS_TYPE
-	default BT_STM32_IPM
-	depends on BT
-endchoice
-
-endif # BOARD_STM32WB5MMG

boards/st/stm32wb5mmg/Kconfig.stm32wb5mmg

@@ -1,8 +1,5 @@
-# STM32WB5MMG Bluetooth module board configuration
-
 # Copyright (c) 2024 Javad Rahimipetroudi <javad.rahimipetroudi@mind.be>
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_STM32WB5MMG
-	bool "stm32wb5mmg ultra low power Bluetooth module"
-	depends on SOC_STM32WB55XX
+	select SOC_STM32WB55XX

boards/st/stm32wb5mmg/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: stm32wb5mmg
+  vendor: st
+  socs:
+    - name: stm32wb55xx

boards/st/stm32wb5mmg/doc/stm32wb5mmg.rst

@@ -179,7 +179,7 @@ The Zephyr STM32WB5MMG board configuration supports the following hardware featu
 Other hardware features are not yet supported on this Zephyr port.
 
 The default configuration can be found in the defconfig file:
-``boards/arm/stm32wb5mmg/stm32wb5mmg_defconfig``
+:zephyr_file:`boards/st/stm32wb5mmg/stm32wb5mmg_defconfig`
 
 Bluetooth and compatibility with STM32WB Copro Wireless Binaries
 ================================================================

boards/st/stm32wb5mmg/stm32wb5mmg_defconfig

@@ -1,6 +1,3 @@
-CONFIG_SOC_SERIES_STM32WBX=y
-CONFIG_SOC_STM32WB55XX=y
-
 # enable uart driver
 CONFIG_SERIAL=y