arm: mvebu: Add DB-XC3-24G4XG board

The DB-XC3-24G4XG is a switch development board from Marvell. It can
either use and external CPU card such as the db-88f6820-amc or the
internal CPU that is integrated into the switch.

Add support for running U-Boot on the internal CPU and enable the USB,
SPI and NAND peripherals. For now this needs the bin_hdr from the
Marvell U-Boot for this board.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/arch/arm/dts/Makefile b/arch/arm/dts/Makefile
index 86a01c2..524c1ee 100644
--- a/arch/arm/dts/Makefile
+++ b/arch/arm/dts/Makefile
@@ -151,7 +151,8 @@
 	armada-xp-theadorable.dtb		\
 	armada-38x-controlcenterdc.dtb		\
 	armada-385-atl-x530.dtb			\
-	armada-385-atl-x530DP.dtb
+	armada-385-atl-x530DP.dtb		\
+	armada-xp-db-xc3-24g4xg.dtb
 
 dtb-$(CONFIG_ARCH_UNIPHIER_LD11) += \
 	uniphier-ld11-global.dtb \