boards: Convert nucleo_f103rb to HWM v2

Port the board to HWMv2.

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

boards/arm/nucleo_f103rb/Kconfig.board

@@ -1,8 +0,0 @@
-# NUCLEO-64 F103RB board configuration
-
-# Copyright (c) 2016 Open-RnD Sp. z o.o.
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_NUCLEO_F103RB
-	bool "NUCLEO-64 F103RB Development Board"
-	depends on SOC_STM32F103XB

boards/arm/nucleo_f103rb/Kconfig.defconfig

@@ -1,11 +0,0 @@
-# NUCLEO-64 F103RB board configuration
-
-# Copyright (c) 2016 Open-RnD Sp. z o.o.
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_NUCLEO_F103RB
-
-config BOARD
-	default "nucleo_f103rb"
-
-endif # BOARD_NUCLEO_F103RB

boards/v2/st/nucleo_f103rb/Kconfig.nucleo_f103rb

@@ -0,0 +1,5 @@
+# Copyright (c) 2016 Open-RnD Sp. z o.o.
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_NUCLEO_F103RB
+	select SOC_STM32F103XB

boards/v2/st/nucleo_f103rb/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: nucleo_f103rb
+  vendor: st
+  socs:
+    - name: stm32f103xb

boards/v2/st/nucleo_f103rb/nucleo_f103rb_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32F1X=y
-CONFIG_SOC_STM32F103XB=y
-
 # enable uart driver
 CONFIG_SERIAL=y
 # enable console