exynos: audiohal: Add QUAD_MIC device and stream definition

* For use by libaudioproxy.
* `DEVICE_QUAD_MIC` and `multi-mic` match what Samsung uses in libaudioproxy and mixer_paths.xml.

Change-Id: Id3849752303677420b02b5f44a10901589f5121b
diff --git a/include/libaudio/audiohal/audio_devices.h b/include/libaudio/audiohal/audio_devices.h
index ac0d6ab..a76f6ad 100644
--- a/include/libaudio/audiohal/audio_devices.h
+++ b/include/libaudio/audiohal/audio_devices.h
@@ -60,6 +60,7 @@
 
     DEVICE_SUB_MIC,
     DEVICE_STEREO_MIC,
+    DEVICE_QUAD_MIC,
     DEVICE_FULL_MIC,
     DEVICE_HCO_MIC,
     DEVICE_VCO_MIC,
diff --git a/include/libaudio/audiohal/audio_tables.h b/include/libaudio/audiohal/audio_tables.h
index 6143553..fe0687a 100644
--- a/include/libaudio/audiohal/audio_tables.h
+++ b/include/libaudio/audiohal/audio_tables.h
@@ -190,6 +190,7 @@
 
     [DEVICE_SUB_MIC]                = "2nd-mic",
     [DEVICE_STEREO_MIC]             = "dualmic",
+    [DEVICE_QUAD_MIC]               = "multi-mic",
     [DEVICE_FULL_MIC]               = "full-mic",
     [DEVICE_HCO_MIC]                = "hco-mic",
     [DEVICE_VCO_MIC]                = "vco-mic",