CHROMIUM: [media] rk3288-vpu: Preserve picture positions in H264 DPB lists

CHROMIUM: [media] rk3288-vpu: Preserve picture positions in H264 DPB lists

Even though H264 standard allows arbitrary order of DPB entries, the
hardware requires picture with given POC to use the same DPB entry for
its whole lifetime. This means that the driver needs to reorder DPB
array to suit this requirement.

This patch modifies the driver to reorder H264 DPB and should fix
corruption issues when DPB array received from userspace does not meet
hardware requirements.

BUG=chrome-os-partner:38416
TEST=http://www.youtube.com/embed/YE7VzlLtp-4

Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/263370
Reviewed-by: Pawel Osciak <posciak@chromium.org>
Tested-by: Caesar Wang <wxt@rock-chips.com>
Change-Id: Ibbd0e2bc4e527aadd21ef08ec68866678bf8a659
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>