Revert "video: msm: Always queue histogram work"

This reverts commit c0d815c2.

Revert patch that is causing excessive histogram logging.
Will merge original patch with fix when issue is resolved and tested.

Change-Id: I99b04362f6acd4f75a72e4b3ca52406907971e67
Signed-off-by: Carl Vanderlip <carlv@codeaurora.org>