hal: Support for stereo recording audio feature

Add support for stereo recording audio feature

Change-Id: I0616bd0292be62d5d6520eb13e3664b15a95bc29
diff --git a/hal/msm8974/platform.h b/hal/msm8974/platform.h
index bc1e784..fe55f1b 100644
--- a/hal/msm8974/platform.h
+++ b/hal/msm8974/platform.h
@@ -105,6 +105,8 @@
     SND_DEVICE_IN_CAPTURE_FM,
     SND_DEVICE_IN_AANC_HANDSET_MIC,
     SND_DEVICE_IN_QUAD_MIC,
+    SND_DEVICE_IN_HANDSET_STEREO_DMIC,
+    SND_DEVICE_IN_SPEAKER_STEREO_DMIC,
     SND_DEVICE_IN_END,
 
     SND_DEVICE_MAX = SND_DEVICE_IN_END,