msm: vidc: Increase timeout for power collapse

Increase power collase timeout to avoid venus power
collapse before the video video/encoding decoding is
actually started. This is needed to avoid iommu map
failures at the beginning of the playback.

Change-Id: I05cade4f6464122d7f3c3b42b4976b9b7a33827f
CRs-fixed: 563706
Signed-off-by: Vinay Kalia <vkalia@codeaurora.org>