audio-lnx: Rename folders to new flat structure.

Kernel audio drivers can be categorised into below folders.
asoc - ALSA based drivers,
asoc/codecs - codec drivers,
ipc - APR IPC communication drivers,
dsp - DSP low level drivers/Audio ION/ADSP Loader,
dsp/codecs - Native encoders and decoders,
soc - SoC based drivers(pinctrl/regmap/soundwire)

Restructure drivers to above folder format.
Include directories also follow above format.

Change-Id: I8fa0857baaacd47db126fb5c1f1f5ed7e886dbc0
Signed-off-by: Laxminath Kasam <lkasam@codeaurora.org>

asoc/codecs/audio-ext-clk-up.h

@@ -0,0 +1,20 @@
+/*
+ * Copyright (c) 2017, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef __AUDIO_EXT_CLK_UP_H_
+#define __AUDIO_EXT_CLK_UP_H_
+
+int audio_ref_clk_platform_init(void);
+void audio_ref_clk_platform_exit(void);
+
+#endif