msm: vidc: Don't free OCMEM during PC when there is an open video instance

Currently, vidc enters power collapse after a video has been paused for 10 seconds; however, the video instance is not closed. Resuming the video after vidc has entered power collapse causes our vidc firmware to crash, thus breaking video functionality until the device is rebooted.

It seems this issue has something to do with OCMEM. Not freeing OCMEM during power collapse in the middle of an open video instance works around this issue (this is not a proper fix). This issue was very prominent with YouTube videos.

Signed-off-by: Sultanxda <sultanxda@gmail.com>