ALSA: fireworks: delete SYTMATCH clock source

In the design of Fireworks board module, the device does't adjust its
media clock voluntarily by the sequence of presentation time expressed in
syt field of CIP header of received packet.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20210531025103.17880-2-o-takashi@sakamocchi.jpSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/fireworks/fireworks.h

@@ -181,7 +181,7 @@ struct snd_efw_phys_meters {
 } __packed;
 enum snd_efw_clock_source {
 	SND_EFW_CLOCK_SOURCE_INTERNAL	= 0,
-	SND_EFW_CLOCK_SOURCE_SYTMATCH	= 1,
+	// Unused.
 	SND_EFW_CLOCK_SOURCE_WORDCLOCK	= 2,
 	SND_EFW_CLOCK_SOURCE_SPDIF	= 3,
 	SND_EFW_CLOCK_SOURCE_ADAT_1	= 4,