dra76-evm has the ddr parts connectedi running at 666MHz: EMIF1: MT41K512M16HA-125 AIT:A x 2 EMIF2: MT41K512M8RH-125-AAT:E x 4 Add support for configuring the above DDR parts. Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>