mmc: omap: Enable for omap5

Signed-off-by: Vincent Stehlé <v-stehle@ti.com>
Hack! All omap dma 64b coherent for LPAE

Signed-off-by: Vincent Stehlé <v-stehle@ti.com>
Config LPAE

Signed-off-by: Vincent Stehlé <v-stehle@ti.com>