Revert "drm/amd/display: Fix writeback_info never got updated"

This reverts commit 8a307777.

[WHY & HOW]
The writeback series cause a regression in thunderbolt display.
Signed-off-by: Alex Hung <alex.hung@amd.com>
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/core/dc_stream.c

@@ -509,13 +509,18 @@ bool dc_stream_remove_writeback(struct dc *dc,
 		return false;
 	}
 
+//	stream->writeback_info[dwb_pipe_inst].wb_enabled = false;
+	for (i = 0; i < stream->num_wb_info; i++) {
+		/*dynamic update*/
+		if (stream->writeback_info[i].wb_enabled &&
+			stream->writeback_info[i].dwb_pipe_inst == dwb_pipe_inst) {
+			stream->writeback_info[i].wb_enabled = false;
+		}
+	}
+
 	/* remove writeback info for disabled writeback pipes from stream */
 	for (i = 0, j = 0; i < stream->num_wb_info; i++) {
 		if (stream->writeback_info[i].wb_enabled) {
-
-			if (stream->writeback_info[i].dwb_pipe_inst == dwb_pipe_inst)
-				stream->writeback_info[i].wb_enabled = false;
-
 			if (j < i)
 				/* trim the array */
 				memcpy(&stream->writeback_info[j], &stream->writeback_info[i],