vidc: Disable venus VBIF dynamic clock gating for video core.

Video core behaviour was inconsistent for different resolutions. This
was due to dynamic clock gating for venus VBIF was enabled. Disable Venus
VBIF clock gating to prevent this inconsistent behaviour.

Change-Id: Id7efd4b7f922efcb77c729f1dc119b1549cb8d74
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>
Signed-off-by: Vinay Kalia <vkalia@codeaurora.org>