nxp:add driver support for sd and emmc

SD & eMMC driver support for NXP SoC.

Signed-off-by: Ruchika Gupta <ruchika.gupta@nxp.com>
Signed-off-by: Pankaj Gupta <pankaj.gupta@nxp.com>
Change-Id: I245fecd2c791697238b5667c46bf5466379695ce
3 files changed