Fixes uninitialized variable return by returning zero
at the end of function.
Signed-off-by: Anisetti Avinash Krishna <anisetti.avinash.krishna@intel.com>
add host controller driver support for emmc version 5.1.
The driver expose zephyr sdhc api interface for emmc host controller.
Signed-off-by: Najumon B.A <najumon.ba@intel.com>