backends/drm: check activePending instead of active for when applying a new gamma ramp is allowed
The crtc may not be set yet in some cases
BUG: 471562 (cherry picked from commit 3bce94c4)
Backport of !4404 (merged)
The crtc may not be set yet in some cases
BUG: 471562 (cherry picked from commit 3bce94c4)
Backport of !4404 (merged)