hal: update feature flag for HDMI EDID

- Compile edid.c when AUDIO_FEATURE_ENABLED_HDMI_EDID
  is enabled.

Change-Id: I2ff1fd591fe2e5693271f37179e0e7a9fbe70e4a
diff --git a/hal/Android.mk b/hal/Android.mk
index 54ac70f..05d3e82 100644
--- a/hal/Android.mk
+++ b/hal/Android.mk
@@ -52,7 +52,7 @@
 LOCAL_C_INCLUDES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr/include
 LOCAL_ADDITIONAL_DEPENDENCIES += $(TARGET_OUT_INTERMEDIATES)/KERNEL_OBJ/usr
 
-ifneq ($(filter msm8994 msm8992 thulium,$(TARGET_BOARD_PLATFORM)),)
+ifeq ($(strip $(AUDIO_FEATURE_ENABLED_HDMI_EDID)),true)
     LOCAL_SRC_FILES += edid.c
 endif