msm-vidc: Allocate bus vote data during initialization

Dynamic reallocation of vote_data memory can cause double free
problem if multiple instances try to reallocate simultaneously.
So allocate this memory statically.

Change-Id: Ib5ff08c600a4b69a38b519688bbc153de9f50090
Signed-off-by: Vasantha <Balla&lt;vballa@codeaurora.org>