drm/amd/display: Fix FreeSync active bit issue

[Why]
The FreeSync active bit unconditionally set in HDMI VSIF.

[How]
Set this bit to true when FAMS is enable on desktop.

Reviewed-by: Felipe Clark <[e-mail]>
Acked-by: Qingqing Zhuo <[e-mail]>
Signed-off-by: Leo (Hanghong) Ma <[e-mail]>
Tested-by: Daniel Wheeler <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/modules/freesync/freesync.c

···
 	 * Check if Freesync is supported. Return if false. If true,
 	 * set the corresponding bit in the info packet
 	 */
+	bool freesync_on_desktop;
+	bool fams_enable;
+
+	fams_enable = stream->ctx->dc->current_state->bw_ctx.bw.dcn.clk.fw_based_mclk_switching;
+	freesync_on_desktop = stream->freesync_on_desktop && fams_enable;
+
 	if (!vrr->send_info_frame)
 		return;
 
 	switch (packet_type) {
 	case PACKET_TYPE_FS_V3:
-		build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop);
+		build_vrr_infopacket_v3(stream->signal, vrr, app_tf, infopacket, freesync_on_desktop);
 		break;
 	case PACKET_TYPE_FS_V2:
-		build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket, stream->freesync_on_desktop);
+		build_vrr_infopacket_v2(stream->signal, vrr, app_tf, infopacket, freesync_on_desktop);
 		break;
 	case PACKET_TYPE_VRR:
 	case PACKET_TYPE_FS_V1:
 	default:
-		build_vrr_infopacket_v1(stream->signal, vrr, infopacket, stream->freesync_on_desktop);
+		build_vrr_infopacket_v1(stream->signal, vrr, infopacket, freesync_on_desktop);
 	}
 
 	if (true == pack_sdp_v1_3 &&