arm: armada-xp: Add basic support for the maxBCM board

The maxBCM board is equipped with the Marvell Armada-XP MV78460 SoC. It
integrates an SPI NOR flash and an Marvell 88E6185 switch.

Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index 13ab831..109d49f 100644
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -144,6 +144,9 @@
 config TARGET_DB_MV784MP_GP
 	bool "Support db-mv784mp-gp"
 
+config TARGET_MAXBCM
+	bool "Support maxbcm"
+
 config TARGET_DEVKIT3250
 	bool "Support devkit3250"
 
@@ -652,6 +655,7 @@
 source "board/karo/tx25/Kconfig"
 source "board/logicpd/imx27lite/Kconfig"
 source "board/logicpd/imx31_litekit/Kconfig"
+source "board/maxbcm/Kconfig"
 source "board/mpl/vcma9/Kconfig"
 source "board/olimex/mx23_olinuxino/Kconfig"
 source "board/palmld/Kconfig"