Follow the same sequence when enabling the cursor plane during
modeset. No point in doing this stuff in different order on different
generations.

This should also avoid a needless wait for vblank for the g4x cursor
workaround when the cursor gets enabled anyway.
Acked-by: Egbert Eich <eich@suse.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>