msm: vidc: Add OCMEM check during power collapse

Targets which does not have ocmem will fail while
performing any ocmem related operations like alloc, free
ocmem. Such failure can abort power collapse.
Add checks to avoid such operation for targets
which do not have ocmem.

Change-Id: Ib021241a1f3027db47accaf49e1b35d6bdb3d06c
Signed-off-by: Vikash Garodia <vgarodia@codeaurora.org>