ARM: atmel: add sama5d4ek board support

The code for this board supports following features:
  - Boot media support: NAND flash/SD card/SPI flash
  - Support LCD display
  - Support ethernet
  - Support USB mass storage

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/arch/arm/include/asm/arch-at91/hardware.h b/arch/arm/include/asm/arch-at91/hardware.h
index d712a0d..bf0a1bd 100644
--- a/arch/arm/include/asm/arch-at91/hardware.h
+++ b/arch/arm/include/asm/arch-at91/hardware.h
@@ -27,6 +27,8 @@
 # include <asm/arch/at91cap9.h>
 #elif defined(CONFIG_SAMA5D3)
 # include <asm/arch/sama5d3.h>
+#elif defined(CONFIG_SAMA5D4)
+# include <asm/arch/sama5d4.h>
 #else
 # error "Unsupported AT91 processor"
 #endif