boards: arm: arduino_uno_r4: Convert to v2

Converts the board to hwmv2

Signed-off-by: Jamie McCrae <jamie.mccrae@nordicsemi.no>

boards/arduino/arduino_uno_r4_minima/Kconfig.arduino_uno_r4_minima

@@ -2,5 +2,4 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_ARDUINO_UNO_R4_MINIMA
-	bool "Arduino Uno R4 Minima board"
-	depends on SOC_R7FA4M1AB3CFM
+	select SOC_R7FA4M1AB3CFM

boards/arduino/arduino_uno_r4_minima/arduino_uno_r4_minima_defconfig

@@ -1,22 +1,19 @@
 # Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_RA4M1=y
-CONFIG_SOC_R7FA4M1AB3CFM=y
-
 CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=48000000
 
 CONFIG_BUILD_OUTPUT_HEX=y
 
-# enable uart driver
+# Enable UART driver
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
 
-# enable console
+# Enable console
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
 
-# enable GPIO
+# Enable GPIO
 CONFIG_GPIO=y
 
 CONFIG_PINCTRL=y

boards/arduino/arduino_uno_r4_minima/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: arduino_uno_r4_minima
+  vendor: Arduino
+  socs:
+  - name: r7fa4m1ab3cfm

boards/boards_legacy/arm/arduino_uno_r4/Kconfig.defconfig

@@ -1,9 +0,0 @@
-# Copyright (c) 2023 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
-# SPDX-License-Identifier: Apache-2.0
-
-if BOARD_ARDUINO_UNO_R4_MINIMA
-
-config BOARD
-	default "arduino_uno_r4_minima" if BOARD_ARDUINO_UNO_R4_MINIMA
-
-endif # BOARD_ARDUINO_UNO_R4_MINIMA