CHROMIUM: [media] rk3288-vpu: Fix VP8 decode corruption

CHROMIUM: [media] rk3288-vpu: Fix VP8 decode corruption

The QP value wasn't correctly clamped by calling function clamp()
with wrong order of arguments. Fix this by passing the arguments
correctly.

BUG=chrome-os-partner:35606
TEST=Open Chrome and navigate to:
http://video.webmfiles.org/elephants-dream.webm

Signed-off-by: ZhiChao Yu <zhichao.yu@rock-chips.com>
[tfiga: Moved back to clamp(), but fixed argument order.]
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/242171
Reviewed-by: Kuang-che Wu <kcwu@chromium.org>
Reviewed-by: Pawel Osciak <posciak@chromium.org>
Change-Id: I415e19e6cdfb125b281d205bcdf93ae9911655f4
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>