ALSA: snd-usb: Playback Design: use usb_set_inferface quirk from more locations

It turns out the devices from Playback Design need the delay quirk
after usb_set_interface from clocks.c as well. Make it a proper
quirks function and factor out the code to quirks.c.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/clock.c b/sound/usb/clock.c
index ae35e7d..b0ec364 100644
--- a/sound/usb/clock.c
+++ b/sound/usb/clock.c
@@ -32,6 +32,7 @@
 #include "card.h"
 #include "helper.h"
 #include "clock.h"
+#include "quirks.h"
 
 static struct uac_clock_source_descriptor *
 	snd_usb_find_clock_source(struct usb_host_interface *ctrl_iface,
@@ -392,7 +393,9 @@
 	 * interface is active. */
 	if (rate != prev_rate) {
 		usb_set_interface(dev, iface, 0);
+		snd_usb_set_interface_quirk(dev);
 		usb_set_interface(dev, iface, fmt->altsetting);
+		snd_usb_set_interface_quirk(dev);
 	}
 
 	return 0;