drm/amd/display: Improve registers write

Add REG_SEQ_SUBMIT and REG_SEQ_WAIT_DONE to optimize the burst write for
the regama lut.
Acked-by: Wayne Lin <wayne.lin@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dpp/dcn10/dcn10_dpp_cm.c

@@ -410,9 +410,10 @@ void dpp1_cm_program_regamma_lut(struct dpp *dpp_base,
 		REG_SET(CM_RGAM_LUT_DATA, 0, CM_RGAM_LUT_DATA, rgb[i].delta_red_reg);
 		REG_SET(CM_RGAM_LUT_DATA, 0, CM_RGAM_LUT_DATA, rgb[i].delta_green_reg);
 		REG_SET(CM_RGAM_LUT_DATA, 0, CM_RGAM_LUT_DATA, rgb[i].delta_blue_reg);
-
 	}
 
+	REG_SEQ_SUBMIT();
+	REG_SEQ_WAIT_DONE();
 }
 
 void dpp1_cm_configure_regamma_lut(