mmc: Merge MMC driver's changes from kernel msm-4.9 to msm-4.14

This is a snapshot of the mmc module taken as of msm-4.9 commit <390c28618>
("Updated SDCC restore seqence for CX Power Collapse event).
This change contains the MMC driver's changes for merging
from kernel version msm-4.9 to msm-4.14.

Change-Id: I2afc64812bd216061cd7d51b7f0d7a213d4fafd9
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>