ALSA: usb-midi: correct speed checking

Allow for SS+ USB devices
Signed-off-by: NOliver Neukum <oneukum@suse.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>

sound/usb/midi.c

@@ -911,6 +911,7 @@ static void snd_usbmidi_us122l_output(struct snd_usb_midi_out_endpoint *ep,
 	switch (snd_usb_get_speed(ep->umidi->dev)) {
 	case USB_SPEED_HIGH:
 	case USB_SPEED_SUPER:
+	case USB_SPEED_SUPER_PLUS:
 		count = 1;
 		break;
 	default: