V4L/DVB (4614): Export symbol saa7134_tvaudio_setmute from saa7134 for saa7134-alsa

saa7134-alsa now unmutes/mutes the line when opening/closing the capture
device, and needs this symbol

Signed-off-by: Ricardo Cerqueira <v4l@cerqueira.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
diff --git a/drivers/media/video/saa7134/saa7134-tvaudio.c b/drivers/media/video/saa7134/saa7134-tvaudio.c
index 0db53d1..d31220d 100644
--- a/drivers/media/video/saa7134/saa7134-tvaudio.c
+++ b/drivers/media/video/saa7134/saa7134-tvaudio.c
@@ -1046,6 +1046,7 @@
 }
 
 EXPORT_SYMBOL(saa_dsp_writel);
+EXPORT_SYMBOL(saa7134_tvaudio_setmute);
 
 /* ----------------------------------------------------------- */
 /*