ASoC: update headers for upstream compliance

Update uapi header reference path to include
path prefix "audio/"

Change-Id: Ic7b1d22910b07be3ffe8d9f02514ed89facea974
Signed-off-by: Vignesh Kulothungan <vigneshk@codeaurora.org>

include/asoc/wcd9xxx-resmgr-v2.h

@@ -1,11 +1,11 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 /*
- * Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2015-2018, 2020 The Linux Foundation. All rights reserved.
  */
 #ifndef __WCD9XXX_COMMON_V2_H__
 #define __WCD9XXX_COMMON_V2_H__
 
-#include <linux/mfd/wcd9xxx/wcd9xxx_registers.h>
+#include <audio/audio/linux/mfd/wcd9xxx/wcd9xxx_registers.h>
 #include "core.h"
 
 enum wcd_clock_type {