Revert "Revert "msm: vidc: Initialize kernel space stack variables""

This fixes typo/build error which CHANGE:4343 is merged which is soon ;)

This reverts commit 73ece75c11d554128210a3edc28013962171a252.

Change-Id: I1f189c3ac5106e8ec12f0f7d841176f1106b9c4d