boards: Convert nucleo_wba52cg to HWM v2

Port the board to HWMv2.

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

boards/boards_legacy/arm/nucleo_wba52cg/Kconfig.board

@@ -1,8 +0,0 @@
-# STM32WBA52CG Nucleo board configuration
-
-# Copyright (c) 2023 STMicroelectronics
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_NUCLEO_WBA52CG
-	bool "Nucleo WBA52CG Development Board"
-	depends on SOC_STM32WBA52XX

boards/st/nucleo_wba52cg/Kconfig.defconfig

@@ -6,9 +6,6 @@
 
 if BOARD_NUCLEO_WBA52CG
 
-config BOARD
-	default "nucleo_wba52cg"
-
 config SPI_STM32_INTERRUPT
 	default y
 	depends on SPI

boards/st/nucleo_wba52cg/Kconfig.nucleo_wba52cg

@@ -0,0 +1,5 @@
+# Copyright (c) 2023 STMicroelectronics
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_NUCLEO_WBA52CG
+	select SOC_STM32WBA52XX

boards/st/nucleo_wba52cg/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: nucleo_wba52cg
+  vendor: st
+  socs:
+    - name: stm32wba52xx

boards/st/nucleo_wba52cg/nucleo_wba52cg_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32WBAX=y
-CONFIG_SOC_STM32WBA52XX=y
-
 # enable uart driver
 CONFIG_SERIAL=y