msm: vidc: Disable clock gating feature

Clock gating between inter frames when video hardware
is in IDLE state is not giving any power savings and
at the same time this feature is resulting in few
stability issues. So disabling clock gating feature.

Change-Id: I3d1d4521ec3ee2fbd25d80b33bd5c531a25d9034
Signed-off-by: Maheshwar Ajja <majja@codeaurora.org>