drm/msm/kms: drop set_encoder_mode callback

set_encoder_mode callback is completely unused now. Drop it from
msm_kms_func().

Signed-off-by: Dmitry Baryshkov <[email protected]>
Reviewed-by: Abhinav Kumar <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Bjorn Andersson <[email protected]>
Signed-off-by: Dmitry Baryshkov <[email protected]>
Signed-off-by: Rob Clark <[email protected]>

Author: lumag

drivers/gpu/drm/msm/msm_kms.h

@@ -117,9 +117,6 @@ struct msm_kms_funcs {
 			struct drm_encoder *encoder,
 			struct drm_encoder *slave_encoder,
 			bool is_cmd_mode);
-	void (*set_encoder_mode)(struct msm_kms *kms,
-				 struct drm_encoder *encoder,
-				 bool cmd_mode);
 	/* cleanup: */
 	void (*destroy)(struct msm_kms *kms);