ARM: at91: add at91sam9g20ek boards dt support

Add both board revision support 1mmc and 2mmc and use a dtsi for common part.

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
4 files changed