ALSA: firewire-motu: add support for AES/EBU clock source in v2 protocol

Although MOTU Traveler supports AES/EBU source for sampling clock,
current implementation of driver doesn't code it.

This commit adds support for AES/EBU source in protocol version 2.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210623075941.72562-4-o-takashi@sakamocchi.jpSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/motu/motu-protocol-v2.c

@@ -121,6 +121,9 @@ static int get_clock_source(struct snd_motu *motu, u32 data,
 	case 5:
 		*src = SND_MOTU_CLOCK_SOURCE_ADAT_ON_DSUB;
 		break;
+	case 7:
+		*src = SND_MOTU_CLOCK_SOURCE_AESEBU_ON_XLR;
+		break;
 	default:
 		*src = SND_MOTU_CLOCK_SOURCE_UNKNOWN;
 		break;