boards: arduino_mkrzero: Convert to HWMv2

Port the board to HWMv2.

Signed-off-by: Gerson Fernando Budke <nandojve@gmail.com>

boards/arduino/arduino_mkrzero/Kconfig.arduino_mkrzero

@@ -1,8 +1,6 @@
-# Arduino MKR Zero Board configuration
-
 # Copyright (c) 2022 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
+# Copyright (c) 2024 Gerson Fernando Budke <nandojve@gmail.com>
 # SPDX-License-Identifier: Apache-2.0
 
 config BOARD_ARDUINO_MKRZERO
-	bool "Arduino MKR Zero"
-	depends on SOC_PART_NUMBER_SAMD21G18A
+	select SOC_SAMD21G18A

boards/arduino/arduino_mkrzero/Kconfig.defconfig

@@ -3,10 +3,6 @@
 # Copyright (c) 2022 TOKITA Hiroshi <tokita.hiroshi@fujitsu.com>
 # SPDX-License-Identifier: Apache-2.0
 
-config BOARD
-	default "arduino_mkrzero"
-	depends on BOARD_ARDUINO_MKRZERO
-
 if DISK_DRIVERS
 
 config DISK_DRIVER_SDMMC

boards/arduino/arduino_mkrzero/arduino_mkrzero_defconfig

@@ -1,14 +1,13 @@
+# Copyright (c) 2024 Gerson Fernando Budke <nandojve@gmail.com>
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_SAMD21=y
-CONFIG_SOC_PART_NUMBER_SAMD21G18A=y
-CONFIG_BOARD_ARDUINO_MKRZERO=y
 CONFIG_SOC_ATMEL_SAMD_XOSC32K=y
 CONFIG_SOC_ATMEL_SAMD_XOSC32K_AS_MAIN=y
+
+CONFIG_BOOTLOADER_BOSSA=y
+CONFIG_BOOTLOADER_BOSSA_ARDUINO=y
+
 CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
 CONFIG_UART_CONSOLE=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
-CONFIG_SERIAL=y
-CONFIG_BOOTLOADER_BOSSA=y
-CONFIG_BOOTLOADER_BOSSA_ARDUINO=y
-CONFIG_GPIO=y

boards/arduino/arduino_mkrzero/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: arduino_mkrzero
+  vendor: arduino
+  socs:
+    - name: samd21g18a

boards/arduino/arduino_mkrzero/doc/index.rst

@@ -66,7 +66,7 @@ features:
 Other hardware features are not currently supported by Zephyr.
 
 The default configuration can be found in the Kconfig
-:zephyr_file:`boards/arm/arduino_mkrzero/arduino_mkrzero_defconfig`.
+:zephyr_file:`boards/arduino/arduino_mkrzero/arduino_mkrzero_defconfig`.
 
 Connections and IOs
 ===================