boards: Convert nucleo_f070rb to HWM v2

Port the board to HWMv2.

Signed-off-by: Erwan Gouriou <erwan.gouriou@st.com>

boards/arm/nucleo_f070rb/Kconfig.board

@@ -1,8 +0,0 @@
-# NUCLEO_F070RB board configuration
-
-# Copyright (c) 2018 qianfan Zhao
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_NUCLEO_F070RB
-	bool "NUCLEO-64 F070RB Development Board"
-	depends on SOC_STM32F070XB

boards/v2/st/nucleo_f070rb/Kconfig.defconfig

@@ -5,9 +5,6 @@
 
 if BOARD_NUCLEO_F070RB
 
-config BOARD
-	default "nucleo_f070rb"
-
 config SPI_STM32_INTERRUPT
 	default y
 	depends on SPI

boards/v2/st/nucleo_f070rb/Kconfig.nucleo_f070rb

@@ -0,0 +1,5 @@
+# Copyright (c) 2018 qianfan Zhao
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_NUCLEO_F070RB
+	select SOC_STM32F070XB

boards/v2/st/nucleo_f070rb/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: nucleo_f070rb
+  vendor: st
+  socs:
+    - name: stm32f070xb

boards/v2/st/nucleo_f070rb/nucleo_f070rb_defconfig

@@ -1,11 +1,7 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # Zephyr Kernel Configuration
-CONFIG_SOC_SERIES_STM32F0X=y
-
 # Platform Configuration
-CONFIG_SOC_STM32F070XB=y
-
 # Serial Drivers
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y