mmc: add 5.0 emmc support

bug: 17968808 Kernel change for new eMMC v5.0 parts for FLO/DEB

Change-Id: Ia18152457fe3ff70401b199c267fa37374b9d544
Signed-off-by: hsuan-chih_chen <hsuan-chih_chen@asus.com>

Conflicts:
	drivers/mmc/core/mmc.c