[media] dvb_demux: clean up whitespace in comments from previous patch (trivial)

removes trailing whitespace and rebalance line length in comment block

Signed-off-by: Michael Krufky <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb-core/dvb_demux.c

···
 	}
 
 	if (feed->is_filtering) {
-		/* release dvbdmx->mutex as far as 
-		   it is acquired by stop_filtering() itself */
+		/* release dvbdmx->mutex as far as it is
+		   acquired by stop_filtering() itself */
 		mutex_unlock(&dvbdmx->mutex);
 		feed->stop_filtering(feed);
 		mutex_lock(&dvbdmx->mutex);