Revert "ALSA: usb-audio: Skip setting clock selector for single connections"

This reverts commit 67794f88.

We need to explicitly set up the clock selector to workaround a problem
with the Behringer mixers. This was originally done in d2e8f641
("ALSA: usb-audio: Explicitly set up the clock selector")

The problem with MOTU M Series mentioned in commit message was fixed in
a different way by checking control capabilities of clock selectors.
Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Link: https://lore.kernel.org/r/20240128132338.819273-1-alexander@tsoy.meSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/usb/clock.c

@@ -344,7 +344,7 @@ static int __uac_clock_find_source(struct snd_usb_audio *chip,
 		if (ret > 0) {
 			/* Skip setting clock selector again for some devices */
 			if (chip->quirk_flags & QUIRK_FLAG_SKIP_CLOCK_SELECTOR ||
-			    pins == 1 || !writeable)
+			    !writeable)
 				return ret;
 			err = uac_clock_selector_set_val(chip, entity_id, cur);
 			if (err < 0)