ALSA: usb-mixer: use defines from audio.h

No need for the private enum.

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/format.c b/sound/usb/format.c
index 0e04efe..fcadedd 100644
--- a/sound/usb/format.c
+++ b/sound/usb/format.c
@@ -218,7 +218,8 @@
 	/* get the number of sample rates first by only fetching 2 bytes */
 	ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 			      USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
-			      0x0100, chip->clock_id << 8, tmp, sizeof(tmp), 1000);
+			      UAC2_CS_CONTROL_SAM_FREQ << 8, chip->clock_id << 8,
+			      tmp, sizeof(tmp), 1000);
 
 	if (ret < 0) {
 		snd_printk(KERN_ERR "unable to retrieve number of sample rates\n");
@@ -236,7 +237,8 @@
 	/* now get the full information */
 	ret = snd_usb_ctl_msg(dev, usb_rcvctrlpipe(dev, 0), UAC2_CS_RANGE,
 			       USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
-			       0x0100, chip->clock_id << 8, data, data_size, 1000);
+			       UAC2_CS_CONTROL_SAM_FREQ << 8, chip->clock_id << 8,
+			       data, data_size, 1000);
 
 	if (ret < 0) {
 		snd_printk(KERN_ERR "unable to retrieve sample rate range\n");