boards: Convert stm32f103_mini to HWM v2

Port the board to HWMv2.

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

boards/arm/stm32f103_mini/Kconfig.board

@@ -1,8 +0,0 @@
-# STM32F103RCT6 Mini board configuration
-
-# Copyright (c) 2020 WuhanStudio
-# SPDX-License-Identifier: Apache-2.0
-
-config BOARD_STM32F103_MINI
-	bool "STM32F103RCT6 Mini Board"
-	depends on SOC_STM32F103XE

boards/arm/stm32f103_mini/Kconfig.defconfig

@@ -1,11 +0,0 @@
-# STM32F103RCT6 Mini board configuration
-
-# Copyright (c) 2020 WuhanStudio
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_STM32F103_MINI
-
-config BOARD
-	default "stm32f103_mini"
-
-endif # BOARD_STM32F103_mini

boards/v2/st/stm32f103_mini/Kconfig.stm32f103_mini

@@ -0,0 +1,5 @@
+# Copyright (c) 2020 WuhanStudio
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_STM32F103_MINI
+	select SOC_STM32F103XE

boards/v2/st/stm32f103_mini/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: stm32f103_mini
+  vendor: st
+  socs:
+    - name: stm32f103xe

boards/v2/st/stm32f103_mini/stm32f103_mini_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32F1X=y
-CONFIG_SOC_STM32F103XE=y
-
 # enable uart driver
 CONFIG_SERIAL=y
 # enable console