mmc: sdhci-msm: enable partial initialization in resume

Enable partial init on eMMC devices for using card Sleep/Awake
sequence (CMD5).

Card will be sent to Sleep state during runtime/system suspend
and will be woken up during runtime/system resume.
By using this sequence the card doesn't need full initialization
which gives time reduction in system/runtime resume path.

Change-Id: Ide2b8050b56e858cda7bb22b4acf43b5bd3db786
Signed-off-by: Talel Shenhar <tatias@codeaurora.org>
Signed-off-by: Maya Erez <merez@codeaurora.org>