boards: arm: bcm958401m2: Convert to v2

Converts the board to hwmv2

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

boards/arm/bcm958401m2/Kconfig.board

@@ -1,8 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-#
-# Copyright 2020 Broadcom.
-#
-
-config BOARD_VALKYRIE_BCM958401M2
-	bool "Broadcom Valkyrie BCM958401M2"
-	depends on SOC_BCM58400

boards/arm/bcm958401m2/Kconfig.defconfig

@@ -1,7 +0,0 @@
-# SPDX-License-Identifier: Apache-2.0
-#
-# Copyright 2020 Broadcom.
-
-config BOARD
-	default "bcm958401m2"
-	depends on BOARD_VALKYRIE_BCM958401M2

boards/v2/broadcom/bcm958401m2/Kconfig.bcm958401m2

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: Apache-2.0
+#
+# Copyright 2020 Broadcom.
+#
+
+config BOARD_BCM958401M2
+	select SOC_BCM58400

boards/v2/broadcom/bcm958401m2/bcm958401m2_defconfig

@@ -1,8 +1,5 @@
 # SPDX-License-Identifier: Apache-2.0
 
-CONFIG_SOC_SERIES_VALKYRIE=y
-CONFIG_SOC_BCM58400=y
-CONFIG_BOARD_VALKYRIE_BCM958401M2=y
 CONFIG_XIP=n
 CONFIG_SERIAL=y
 CONFIG_UART_INTERRUPT_DRIVEN=y

boards/v2/broadcom/bcm958401m2/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: bcm958401m2
+  vendor: Broadcom
+  socs:
+  - name: bcm58400