ALSA: firewire-tascam: off by one in identify_model()

Let's leave space for the NUL char otherwise the static checkers
complain that we go beyond the end of the array.

Fixes: 53b3ffee ('ALSA: firewire-tascam: change device probing processing')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/tascam/tascam.c

@@ -40,7 +40,7 @@ static int identify_model(struct snd_tscm *tscm)
 {
 	struct fw_device *fw_dev = fw_parent_device(tscm->unit);
 	const u32 *config_rom = fw_dev->config_rom;
-	char model[8];
+	char model[9];
 	unsigned int i;
 	u8 c;