mmc: sdhci: pull in missing changes during msm3.4 kernel upgrade

During MSM 3.4 kernel upgrade the changes to already existing
files sdhci.c and sdhci.h were missed out. As a result of which,
these files are still pointing to 3.0 changes. This commit adds
those missing changes back.

Change-Id: Ibfabd11948dcf90db5b79688b694ff889bd55a60
Signed-off-by: Sahitya Tummala <stummala@codeaurora.org>