drm/msm/gem: Demote userspace errors to DRM_UT_DRIVER

[ Upstream commit b2acb89a ]

Error messages resulting from incorrect usage of the kernel uabi should
not spam dmesg by default.  But it is useful to enable them to debug
userspace.  So demote to DRM_UT_DRIVER.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Patchwork: https://patchwork.freedesktop.org/patch/564189/


Stable-dep-of: 3a47f4b4 ("drm/msm/gem: prevent integer overflow in msm_ioctl_gem_submit()")
Signed-off-by: Sasha Levin <sashal@kernel.org>