drm/amd/display: Add a new flag for replay low hz

[Why & How]
Add a new flag in replay_config to indicate the replay
low hz status.

Reviewed-by: Allen Li <allen.li@amd.com>
Signed-off-by: Robin Chen <robin.chen@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: Robin Chen

drivers/gpu/drm/amd/display/dc/dc_types.h

@@ -1119,6 +1119,8 @@ struct replay_config {
 	union replay_error_status replay_error_status;
 	/* Replay Low Hz enable Options */
 	union replay_low_refresh_rate_enable_options low_rr_enable_options;
+	/* Replay coasting vtotal is within low refresh rate range. */
+	bool low_rr_activated;
 };
 
 /* Replay feature flags*/