CHROMIUM: [media] rk3288-vpu: Fix image size clamping

CHROMIUM: [media] rk3288-vpu: Fix image size clamping

Current code always assumed the maximum supported resolution to be
1920x1088, and minimum 8x4 however the real limits are 48x48 and 3840x2160
for decoder and 96x96 and 1920x1088 for encoder. This patch modifies the
driver to use correct limits and also fixes incorrect log message.

BUG=chrome-os-partner:38232,chromium:464920
TEST=Screen sharing of a window bigger than 1920x1088 to Jerry

Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/261851
Reviewed-by: Pawel Osciak <posciak@chromium.org>
Change-Id: I0c51e5a9ad235716ee447e052455b97ed0c295de
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Yakir Yang <ykk@rock-chips.com>