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Replace our own custom V4L2_CID_MPEG_VIDEO_H264_SPS_PPS_BEFORE_IDR with
V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR that serves the same purpose,
but is available upstream.

Since this control is not necessarily defined for older kernels, keep
our own definition in case it is missing to avoid breaking builds. The
control will just be reported as unavailable in this case.

BUG=b:167992324
TEST=Chromium builds for arm-generic

Change-Id: I5f210f76ea0cccf4f7efe606dc8b873c3d254bea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2409058Reviewed-by: David Staessens <dstaessens@chromium.org>
Reviewed-by: Chih-Yu Huang <akahuang@chromium.org>
Commit-Queue: Alexandre Courbot <acourbot@chromium.org>
Cr-Commit-Position: refs/heads/master@{#808769}