Revert "msm: vidc: Free OCMEM during power collapse"

This fixes YouTube 720p prolonged pause bug.

Issue - YouTube 720p prolong pause will result in black screen and
        subsequently unable to play any 720p videos untill reboot.

Possible issue in reverting this commit
- I am unsure if I cleanly reverted but YouTube 720p prolong pause
is fixed. All videos tested ok.

This reverts commit ff172f92160858595e5b292da875f9e0841ad553.

Conflicts:
	drivers/media/platform/msm/vidc/venus_hfi.c
	drivers/media/platform/msm/vidc/venus_hfi.h
Build v3.92 EXP2