boards: arm: apollo4p_blue_kxr_evb: Convert to v2

Converts the board to hwmv2

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

boards/ambiq/apollo4p_blue_kxr_evb/Kconfig.apollo4p_blue_kxr_evb

@@ -3,5 +3,4 @@
 # Copyright (c) 2023 Ambiq Micro Inc. <www.ambiq.com>
 
 config BOARD_APOLLO4P_BLUE_KXR_EVB
-	bool "Ambiq Apollo4 Blue Plus KXR Evaluation Board"
-	depends on SOC_APOLLO4P_BLUE
+	select SOC_APOLLO4P_BLUE

boards/ambiq/apollo4p_blue_kxr_evb/Kconfig.defconfig

@@ -2,9 +2,7 @@
 #
 # Copyright (c) 2023 Ambiq Micro Inc. <www.ambiq.com>
 
-config BOARD
-	default "apollo4p_blue_kxr_evb"
-	depends on BOARD_APOLLO4P_BLUE_KXR_EVB
+if BOARD_APOLLO4P_BLUE_KXR_EVB
 
 if BT
 
@@ -36,3 +34,5 @@ config BT_L2CAP_TX_MTU
 	default 247
 
 endif # BT
+
+endif # BOARD_APOLLO4P_BLUE_KXR_EVB

boards/ambiq/apollo4p_blue_kxr_evb/apollo4p_blue_kxr_evb_defconfig

@@ -2,8 +2,6 @@
 #
 # Copyright (c) 2023 Ambiq Micro Inc. <www.ambiq.com>
 
-CONFIG_SOC_SERIES_APOLLO4X=y
-CONFIG_SOC_APOLLO4P_BLUE=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
 CONFIG_SERIAL=y

boards/ambiq/apollo4p_blue_kxr_evb/board.yml

@@ -0,0 +1,5 @@
+board:
+  name: apollo4p_blue_kxr_evb
+  vendor: Ambiq
+  socs:
+  - name: apollo4p_blue