hal: compilation fix for extended feature flags

- Fix compilation error for offload, Dolby,
  HDMI pass through, FLAC decoder, and hardware
  accelerated effects when extended feature
  flags are disabled.

Change-Id: I5b36d7668f63a396ed930d62c0337c2c3f311c95
diff --git a/hal/Android.mk b/hal/Android.mk
index e0149f9..315aab2 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -53,6 +53,7 @@
 LOCAL_ADDITIONAL_DEPENDENCIES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
 
 ifeq ($(strip $(AUDIO_FEATURE_ENABLED_HDMI_EDID)),true)
+    LOCAL_CFLAGS += -DHDMI_EDID
     LOCAL_SRC_FILES += edid.c
 endif