Updated the UFS Hibernate Enter and Exit sequences according to
the UFS Host Controller Hardware Programming Guide.
On the Waipio platforms, software must select the proper source
for the UFS PHY clocks prior to entering hibernate state.
Failure to follow the Hardware Programming Guide's
Hibernate Enter and Exit sequences will result in the UFS GDSC
clock failure.
Change-Id: I798f643fc2dcef75db2991252f9d985f5aba3687
Signed-off-by: Bao D. Nguyen <nguyenb@codeaurora.org>