Rockchip: Do not print out a SYS_ioctl error message at the end of VIDIOC_ENUM_FMT enumeration loop

Do not print out SYS_ioctl error message, when cmd is VIDIOC_ENUM_FMT and
it returns EINVAL.
It would be at the end of enumeration loop. It is not a real error then.

BUG=chromium:742688
TEST=VEA unittest on kevin

Change-Id: I78802f0351fe145107e89b7b296e6b75eae2f350
Reviewed-on: https://chromium-review.googlesource.com/578529
Commit-Ready: Hirokazu Honda <hiroh@chromium.org>
Tested-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Pawel Osciak <posciak@chromium.org>
2 files changed
tree: 54775eb49194be07d2ef639c89206dfd48ce8205
  1. libv4l-rockchip/
  2. libv4l-rockchip_v2/
  3. OWNERS