drm/amd/display: Set full update flag in dcn_validate_bandwidth

Doing bandwidth validation implies that this is a full update. Set the
flag inside the function in case whatever is calling
dcn_validate_bandwidth doesn't set it.

Signed-off-by: Andrew Jiang <Andrew.Jiang@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/calcs/dcn_calcs.c

@@ -1013,6 +1013,8 @@ bool dcn_validate_bandwidth(
 			if (pipe->plane_state) {
 				struct pipe_ctx *hsplit_pipe = pipe->bottom_pipe;
 
+				pipe->plane_state->update_flags.bits.full_update = 1;
+
 				if (v->dpp_per_plane[input_idx] == 2 ||
 					((pipe->stream->view_format ==
 					  VIEW_3D_FORMAT_SIDE_BY_SIDE ||