ALSA: caiaq: Fix -Wformat-truncation warning

The filling of card->longname can be gracefully truncated, as it's
only informative.  Use scnprintf() and suppress the superfluous
compile warning with -Wformat-truncation.

Link: https://lore.kernel.org/r/20230915082802.28684-5-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/caiaq/device.c

@@ -485,7 +485,7 @@ static int init_card(struct snd_usb_caiaqdev *cdev)
 	}
 
 	usb_make_path(usb_dev, usbpath, sizeof(usbpath));
-	snprintf(card->longname, sizeof(card->longname), "%s %s (%s)",
+	scnprintf(card->longname, sizeof(card->longname), "%s %s (%s)",
 		       cdev->vendor_name, cdev->product_name, usbpath);
 
 	setup_card(cdev);