ALSA: oxygen: configure MIDI via device_config

To enable the MIDI port, model drivers must now set flags in
device_config, not only in misc_flags.  This allows model drivers to
enable the UART without creating an ALSA MIDI device.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
diff --git a/sound/pci/oxygen/oxygen_lib.c b/sound/pci/oxygen/oxygen_lib.c
index 02191c6..b199721 100644
--- a/sound/pci/oxygen/oxygen_lib.c
+++ b/sound/pci/oxygen/oxygen_lib.c
@@ -502,10 +502,15 @@
 	if (err < 0)
 		goto err_card;
 
-	if (chip->model.misc_flags & OXYGEN_MISC_MIDI) {
+	if (chip->model.device_config & (MIDI_OUTPUT | MIDI_INPUT)) {
+		unsigned int info_flags = MPU401_INFO_INTEGRATED;
+		if (chip->model.device_config & MIDI_OUTPUT)
+			info_flags |= MPU401_INFO_OUTPUT;
+		if (chip->model.device_config & MIDI_INPUT)
+			info_flags |= MPU401_INFO_INPUT;
 		err = snd_mpu401_uart_new(card, 0, MPU401_HW_CMIPCI,
 					  chip->addr + OXYGEN_MPU401,
-					  MPU401_INFO_INTEGRATED, 0, 0,
+					  info_flags, 0, 0,
 					  &chip->midi);
 		if (err < 0)
 			goto err_card;