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/sdm660-external.h

@@ -0,0 +1,54 @@
+/* Copyright (c) 2015-2017, 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 __SDM660_EXTERNAL
+#define __SDM660_EXTERNAL
+
+int msm_snd_hw_params(struct snd_pcm_substream *substream,
+		      struct snd_pcm_hw_params *params);
+int msm_ext_slimbus_2_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params);
+int msm_btsco_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				 struct snd_pcm_hw_params *params);
+int msm_proxy_rx_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				    struct snd_pcm_hw_params *params);
+int msm_proxy_tx_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+				    struct snd_pcm_hw_params *params);
+int msm_audrx_init(struct snd_soc_pcm_runtime *rtd);
+int msm_snd_cpe_hw_params(struct snd_pcm_substream *substream,
+			  struct snd_pcm_hw_params *params);
+struct snd_soc_card *populate_snd_card_dailinks(struct device *dev,
+						int snd_card_val);
+int msm_ext_be_hw_params_fixup(struct snd_soc_pcm_runtime *rtd,
+			       struct snd_pcm_hw_params *params);
+#ifdef CONFIG_SND_SOC_EXT_CODEC
+int msm_ext_cdc_init(struct platform_device *, struct msm_asoc_mach_data *,
+		     struct snd_soc_card **, struct wcd_mbhc_config *);
+void msm_ext_register_audio_notifier(struct platform_device *pdev);
+void msm_ext_cdc_deinit(struct msm_asoc_mach_data *pdata);
+#else
+inline int msm_ext_cdc_init(struct platform_device *pdev,
+			    struct msm_asoc_mach_data *pdata,
+			    struct snd_soc_card **card,
+			    struct wcd_mbhc_config *wcd_mbhc_cfg_ptr1)
+{
+	return 0;
+}
+
+inline void msm_ext_register_audio_notifier(struct platform_device *pdev)
+{
+}
+inline void msm_ext_cdc_deinit(void)
+{
+}
+#endif
+#endif