drm/amd/display: Add struct field for future use

Add dmub related struct field for future use.
Signed-off-by: Anthony Koo <Anthony.Koo@amd.com>
Reviewed-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dmub/inc/dmub_cmd.h

@@ -262,6 +262,7 @@ struct dmub_cmd_abm_set_pipe_data {
 	uint32_t ramping_boundary;
 	uint32_t otg_inst;
 	uint32_t panel_inst;
+	uint32_t set_pipe_option;
 };
 
 struct dmub_rb_cmd_abm_set_pipe {