[PATCH] Fix invalid volume resolution for Logitech HD Webcam C525

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From: Maksim Boyko <maksim.a.boyko@xxxxxxxxx>

Add the volume control quirk for avoiding the kernel warning for Logitech HD Webcam C525.
The similar patch was previously reported for Logitech HD Webcam C310 (see 36691e1be6ec551eef4a5225f126a281f8c051c2).

--- linux-3.10.5-orig/sound/usb/mixer.c	2013-08-04 12:51:49.000000000 +0400
+++ linux-3.10.5/sound/usb/mixer.c	2013-08-06 21:12:42.274197287 +0400
@@ -888,6 +888,7 @@
         case USB_ID(0x046d, 0x081b): /* HD Webcam c310 */
         case USB_ID(0x046d, 0x081d): /* HD Webcam c510 */
         case USB_ID(0x046d, 0x0825): /* HD Webcam c270 */
+	case USB_ID(0x046d, 0x0826): /* HD Webcam c525 */
         case USB_ID(0x046d, 0x0991):
         /* Most audio usb devices lie about volume resolution.
          * Most Logitech webcams have res = 384.
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