ARM: atmel: add sama5d3xek support

Add sama5d3xek support with following feature
  - boot from NAND flash, PMECC support, 4bit ECC @ 512 bytes sector
  - boot from SPI flash support
  - boot from SD card support
  - LCD support
  - EMAC support
  - USB OHCI support

Signed-off-by: Bo Shen <voice.shen@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index efc2ecc..2bd0a98 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -918,6 +918,7 @@
 
 Bo Shen <voice.shen@atmel.com>
 	at91sam9x5ek		ARM926EJS (AT91SAM9G15,G25,G35,X25,X35 SoC)
+	sama5d3xek		ARMV7 (SAMA5D31, D33, D34, D35 SoC)
 
 Rajeshwari Shinde <rajeshwari.s@samsung.com>