fmradio: use caf naming

Change-Id: I9e0fefa3f2dabe991c6be63ab13a18ca38c37f71
diff --git a/media/libstagefright/FMRadioSource.cpp b/media/libstagefright/FMRadioSource.cpp
index 4229f23..c657e0c 100644
--- a/media/libstagefright/FMRadioSource.cpp
+++ b/media/libstagefright/FMRadioSource.cpp
@@ -38,7 +38,7 @@
       mSessionId(AudioSystem::newAudioSessionId()) {
 
     // get FM Radio RX input
-    audio_io_handle_t input = AudioSystem::getInput(AUDIO_SOURCE_FM_RADIO_RX,
+    audio_io_handle_t input = AudioSystem::getInput(AUDIO_SOURCE_FM_RX,
                                                     kSampleRate,
                                                     kAudioFormat,
                                                     kChannelMask,