V4L2VEA: fix keyframe is not generated on nyan

V4L2VEA: fix keyframe is not generated on nyan

Nyan does not support V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME yet.
But it reports success to V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME
and keyframe is not generated. Switch the order of two controls
and try V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE first.

BUG=chromium:612198
TEST=Run VEA test on nyan and oak.

Review-Url: https://codereview.chromium.org/2069923005
Cr-Commit-Position: refs/heads/master@{#400328}
(cherry picked from commit 5a83a05e8647c71db1e155dec4c030d5f581e380)

Committed: https://chromium.googlesource.com/chromium/src/+/c67053364e031746af29283a5113fae2214abe8b

[wuchengli, 2016-06-22 02:24:50]

Description was changed from

==========
V4L2VEA: fix keyframe is not generated on nyan

Nyan does not support V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME yet.
But it reports success to V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME
and keyframe is not generated. Switch the order of two controls
and try V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE first.

BUG=chromium:612198
TEST=Run VEA test on nyan and oak.

Review-Url: https://codereview.chromium.org/2069923005
Cr-Commit-Position: refs/heads/master@{#400328}
(cherry picked from commit 5a83a05e8647c71db1e155dec4c030d5f581e380)
==========

to

==========
V4L2VEA: fix keyframe is not generated on nyan

Nyan does not support V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME yet.
But it reports success to V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME
and keyframe is not generated. Switch the order of two controls
and try V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE first.

BUG=chromium:612198
TEST=Run VEA test on nyan and oak.

Review-Url: https://codereview.chromium.org/2069923005
Cr-Commit-Position: refs/heads/master@{#400328}
(cherry picked from commit 5a83a05e8647c71db1e155dec4c030d5f581e380)

Committed:
https://chromium.googlesource.com/chromium/src/+/c67053364e031746af29283a5113...
==========

[wuchengli, 2016-06-22 02:24:53]

Committed patchset #1 (id:1) manually as
c67053364e031746af29283a5113fae2214abe8b.