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.

Bug: 32341313
Change-Id: Ib14a866095ecb48f559f39e7956dc009ebddce84
Signed-off-by: Andrew Chant <achant@google.com>