arm: atmel: Add SAMA5D2 Xplained board

The board supports following features:
 - Boot media support: SD card/e.MMC/SPI flash,
 - Support LCD display (optional, disabled by default),
 - Support ethernet,
 - Support USB mass storage.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
[fix checkpatch warnings]
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/arch/arm/mach-at91/armv7/Makefile b/arch/arm/mach-at91/armv7/Makefile
index f4f35a4..9538bc1 100644
--- a/arch/arm/mach-at91/armv7/Makefile
+++ b/arch/arm/mach-at91/armv7/Makefile
@@ -8,6 +8,7 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+obj-$(CONFIG_SAMA5D2)	+= sama5d2_devices.o
 obj-$(CONFIG_SAMA5D3)	+= sama5d3_devices.o
 obj-$(CONFIG_SAMA5D4)	+= sama5d4_devices.o
 obj-y += clock.o