ALSA: usb-audio: remove invalid extra mixers for Komplete Audio 6

This was a flaw in the reading of the spec tables - Native Instrument's
"Komplete Audio 6" device has no such extra controls.

This patch also fixes the device name in two comments.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/usb/quirks-table.h b/sound/usb/quirks-table.h
index 54e18c1..5c1a176 100644
--- a/sound/usb/quirks-table.h
+++ b/sound/usb/quirks-table.h
@@ -2332,7 +2332,7 @@
 
 /* Native Instruments MK2 series */
 {
-	/* Audio Kontrol 6 */
+	/* Komplete Audio 6 */
 	.match_flags = USB_DEVICE_ID_MATCH_DEVICE,
 	.idVendor = 0x17cc,
 	.idProduct = 0x1000,