boards: arm: mg100: Convert to v2

Converts the board to hwmv2

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

boards/laird_connect/mg100/Kconfig.defconfig

@@ -3,9 +3,6 @@
 
 if BOARD_MG100
 
-config BOARD
-	default "mg100"
-
 config MODEM
 	default NETWORKING
 

boards/laird_connect/mg100/Kconfig.mg100

@@ -2,5 +2,6 @@
 # SPDX-License-Identifier: Apache-2.0
 
 config  BOARD_MG100
-	bool "MG100"
-	depends on SOC_NRF52840_QIAA
+	bool
+	default y
+	select SOC_NRF52840_QIAA

boards/laird_connect/mg100/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: mg100
+  vendor: Laird Connectivity
+  socs:
+  - name: nrf52840

boards/laird_connect/mg100/doc/index.rst

@@ -231,7 +231,7 @@ the board are working properly with Zephyr:
 
 You can build and flash the examples to make sure Zephyr is running correctly on
 your board. The button and LED definitions can be found in
-:zephyr_file:`boards/arm/mg100/mg100.dts`.
+:zephyr_file:`boards/laird_connect/mg100/mg100.dts`.
 
 References
 **********

boards/laird_connect/mg100/mg100_defconfig

@@ -1,10 +1,6 @@
 # Copyright (c) 2022 Laird Connectivity
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_NRF52X=y
-CONFIG_SOC_NRF52840_QIAA=y
-CONFIG_BOARD_MG100=y
-
 # Enable MPU
 CONFIG_ARM_MPU=y