board: ti: dra71x-evm: Add mux settings

Add mux and iodelay settings for dra71x-evm.
Data generated using PCT_DRA71x_SR2.0_v1.0.0.0 version (June 2016).

Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
Reviewed-by: Tom Rini <trini@konsulko.com>