[ALSA] fix port type bits

Fix the port information about non-MIDI messages that had wrong values
for some OPL3 and EmuX ports.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/sound/drivers/opl3/opl3_oss.c b/sound/drivers/opl3/opl3_oss.c
index fccf019..d48f8de 100644
--- a/sound/drivers/opl3/opl3_oss.c
+++ b/sound/drivers/opl3/opl3_oss.c
@@ -99,8 +99,7 @@
 	opl3->oss_chset->port = snd_seq_event_port_attach(opl3->seq_client, &callbacks,
 							  SNDRV_SEQ_PORT_CAP_WRITE,
 							  SNDRV_SEQ_PORT_TYPE_MIDI_GENERIC |
-							  SNDRV_SEQ_PORT_TYPE_MIDI_GM |
-							  SNDRV_SEQ_PORT_TYPE_SYNTH,
+							  SNDRV_SEQ_PORT_TYPE_MIDI_GM,
 							  voices, voices,
 							  name);
 	if (opl3->oss_chset->port < 0) {