drm: add drm_property_change_is_valid
drm: add drm_property_change_is_valid

Move code from drm_mode_connector_property_set_ioctl to a new
function, so we can reuse this code when we add crtc properties.

Reviewed-by: Eugeni Dodonov <8cab21ffd2ceb3ee06d75e34eb970dfea6bd7cc6@intel.com>
Reviewed-by: Rob Clark <e4b68ba543616fa01f7d35cc4057ddf9f04ce2e6@linaro.org>
Tested-by: Rob Clark <e4b68ba543616fa01f7d35cc4057ddf9f04ce2e6@linaro.org>
Signed-off-by: Paulo Zanoni <cc0e04a2103c45cd195651d976f79813d0f66bdf@intel.com>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@redhat.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs