msm: mdss: restore ctl registers when idle power collapse is enabled

In the current implementation, control register are not being restored
for the compression modes. This causes display corruption on command
mode panels if idle power collapse is enabled. This change restores the
compression mode registers while coming out of idle power collapse.

CRs-Fixed: 859333
Change-Id: Id40270e78b798f3baf7a6c3ad2598f7f12bbf3fb
Signed-off-by: Jeevan Shriram <jshriram@codeaurora.org>