hal: fix compilation issues with audio FM extention.

- Update FM device references to match latest
  definitions to fix compilation of FM extention.
- Update FM feature flag for power optimization

Change-Id: I17a9e240e552c4089d3e9c7a25e437fb5b5433f9
diff --git a/hal/audio_extn/audio_extn.h b/hal/audio_extn/audio_extn.h
index 6beaa95..9cbed19 100644
--- a/hal/audio_extn/audio_extn.h
+++ b/hal/audio_extn/audio_extn.h
@@ -42,13 +42,8 @@
 #define AUDIO_OUTPUT_FLAG_INCALL_MUSIC 0x8000
 #endif
 
-#ifndef FM_ENABLED
-#define AUDIO_DEVICE_OUT_FM 0x80000
-#define AUDIO_DEVICE_OUT_FM_TX 0x100000
-#define AUDIO_SOURCE_FM_RX 9
-#define AUDIO_SOURCE_FM_RX_A2DP 10
-#define AUDIO_DEVICE_IN_FM_RX (AUDIO_DEVICE_BIT_IN | 0x8000)
-#define AUDIO_DEVICE_IN_FM_RX_A2DP (AUDIO_DEVICE_BIT_IN | 0x10000)
+#ifndef AUDIO_DEVICE_OUT_FM_TX
+#define AUDIO_DEVICE_OUT_FM_TX 0x8000000
 #endif