CHROMIUM: s5p-mfc: fix DISPLAY_DELAY

CHROMIUM: s5p-mfc: fix DISPLAY_DELAY

V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE is being
ignored, and the display delay is always being applied.  Fix this.

Signed-off-by: John Sheu <sheu@google.com>
BUG=chromium:175638
BUG=chromium-os:38121
BUG=chromium-os:38376
BUG=chromium-os:38693
TEST=local build, run on snow

Change-Id: I0b098d021d656197d058e573cf66a3b1f624a275
Reviewed-on: https://gerrit.chromium.org/gerrit/43677
Reviewed-by: Pawel Osciak <posciak@chromium.org>
Commit-Queue: John Sheu <sheu@chromium.org>
Tested-by: John Sheu <sheu@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/45655
Reviewed-by: John Sheu <sheu@chromium.org>