ALSA: usb-audio: add support for samplerate setting on v2 devices

Sample rate setting is done with a 4-byte long class request that
addresses the interface.

Signed-off-by: Daniel Mack <daniel@caiaq.de>
Cc: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/endpoint.c b/sound/usb/endpoint.c
index d65235c..91850f8 100644
--- a/sound/usb/endpoint.c
+++ b/sound/usb/endpoint.c
@@ -350,8 +350,8 @@
 		}
 		/* try to set the interface... */
 		usb_set_interface(chip->dev, iface_no, altno);
-		snd_usb_init_pitch(chip->dev, iface_no, alts, fp);
-		snd_usb_init_sample_rate(chip->dev, iface_no, alts, fp, fp->rate_max);
+		snd_usb_init_pitch(chip, iface_no, alts, fp);
+		snd_usb_init_sample_rate(chip, iface_no, alts, fp, fp->rate_max);
 	}
 	return 0;
 }