Add atoll target for audio hal.

Add atoll target for audio hal.

Change-Id: Iccc9568403daed4acef94724bee655fe8d5d2aa9
diff --git a/hal/Android.mk b/hal/Android.mk
index a671373..1a0c2e2 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -88,6 +88,10 @@
   LOCAL_CFLAGS := -DPLATFORM_LITO
   LOCAL_CFLAGS += -DMAX_TARGET_SPECIFIC_CHANNEL_CNT="4"
 endif
+ifneq ($(filter atoll,$(TARGET_BOARD_PLATFORM)),)
+  LOCAL_CFLAGS := -DPLATFORM_ATOLL
+  LOCAL_CFLAGS += -DMAX_TARGET_SPECIFIC_CHANNEL_CNT="4"
+endif
 ifneq ($(filter sdm660,$(TARGET_BOARD_PLATFORM)),)
   LOCAL_CFLAGS := -DPLATFORM_MSMFALCON
   LOCAL_CFLAGS += -DMAX_TARGET_SPECIFIC_CHANNEL_CNT="8"