boards: Convert nucleo_g070rb to HWM v2

Port the board to HWMv2.

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

boards/boards_legacy/arm/nucleo_g070rb/Kconfig.board

@@ -1,8 +0,0 @@
-# STM32 Nucleo-64 development board with STM32G070RB MCU configuration
-
-# Copyright (c) 2023 Marin Jurjević <marin.jurjevic@hotmail.com>
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_NUCLEO_G070RB
-	bool "NUCLEO-64 G070RB Development Board"
-	depends on SOC_STM32G070XX

boards/boards_legacy/arm/nucleo_g070rb/Kconfig.defconfig

@@ -1,11 +0,0 @@
-# STM32 Nucleo-64 development board with STM32G070RB MCU
-
-# Copyright (c) 2023 Marin Jurjević <marin.jurjevic@hotmail.com>
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_NUCLEO_G070RB
-
-config BOARD
-	default "nucleo_g070rb"
-
-endif # BOARD_NUCLEO_G070RB

boards/st/nucleo_g070rb/Kconfig.nucleo_g070rb

@@ -0,0 +1,5 @@
+# Copyright (c) 2023 Marin Jurjević <marin.jurjevic@hotmail.com>
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_NUCLEO_G070RB
+	select SOC_STM32G070XX

boards/st/nucleo_g070rb/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: nucleo_g070rb
+  vendor: st
+  socs:
+    - name: stm32g070xx

boards/st/nucleo_g070rb/nucleo_g070rb_defconfig

@@ -1,7 +1,3 @@
-# Zephyr Kernel Configuration
-CONFIG_SOC_SERIES_STM32G0X=y
-CONFIG_SOC_STM32G070XX=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y