audio-lnx: Initial change for techpack of audio drivers.

Add snapshot for audio drivers for SDM targets. The code is
migrated from msm-4.9 kernel at the below cutoff -

(74ff856e8d6: "net: ipc_router: Add dynamic enable/disable
wakeup source feature")

This changes are done for new techpack addition
for audio kernel. Migrate all audio kernel drivers
to this techpack.

Change-Id: I33d580af3ba86a5cb777583efc5d4cdaf2882d93
Signed-off-by: Asish Bhattacharya <asishb@codeaurora.org>

include/uapi/sound/voice_params.h

@@ -0,0 +1,14 @@
+#ifndef __VOICE_PARAMS_H__
+#define __VOICE_PARAMS_H__
+
+#include <linux/types.h>
+#include <sound/asound.h>
+
+enum voice_lch_mode {
+	VOICE_LCH_START = 1,
+	VOICE_LCH_STOP
+};
+
+#define SNDRV_VOICE_IOCTL_LCH _IOW('U', 0x00, enum voice_lch_mode)
+
+#endif