hal: Add support for generic effect framework

Base changes for supporting generic effect framework
in HAL

Change-Id: I1f5a8d7748848cd5981b86017e6a4466d6b27be7
CRs-Fixed: 1043932
diff --git a/hal/Android.mk b/hal/Android.mk
index 812ed99..f457c7b 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -314,6 +314,11 @@
     LOCAL_CFLAGS += -DDISPLAY_PORT_ENABLED
 endif
 
+ifeq ($(strip $(AUDIO_FEATURE_ENABLED_GEF_SUPPORT)),true)
+    LOCAL_CFLAGS += -DAUDIO_GENERIC_EFFECT_FRAMEWORK_ENABLED
+    LOCAL_SRC_FILES += audio_extn/gef.c
+endif
+
 LOCAL_CFLAGS += -Wall -Werror
 
 LOCAL_COPY_HEADERS_TO   := mm-audio