boards: Convert stm32f401_mini to HWM v2

Port the board to HWMv2.

Signed-off-by: Abderrahmane Jarmouni <abderrahmane.jarmouni-ext@st.com>

boards/others/stm32f401_mini/Kconfig.defconfig

@@ -5,9 +5,6 @@
 
 if BOARD_STM32F401_MINI
 
-config BOARD
-	default "stm32f401_mini"
-
 config SPI_STM32_INTERRUPT
 	default y
 	depends on SPI

boards/others/stm32f401_mini/Kconfig.stm32f401_mini

@@ -1,8 +1,5 @@
 # Copyright (c) 2022 Brian Bradley
 # SPDX-License-Identifier: Apache-2.0
 
-# STM32 Mini F401 Board
-
 config BOARD_STM32F401_MINI
-	bool "STM32 Mini F401 Board"
-	depends on SOC_STM32F401XC
+	select SOC_STM32F401XC

boards/others/stm32f401_mini/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: stm32f401_mini
+  vendor: others
+  socs:
+    - name: stm32f401xc

boards/others/stm32f401_mini/stm32f401_mini_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_STM32F4X=y
-CONFIG_SOC_STM32F401XC=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y