Rename FAST_MIXER_STATISTICS to FAST_THREAD_STATISTICS

Change-Id: Idb5f5bf0c20bffff8536cf4a46f696e12e99e81b
diff --git a/services/audioflinger/FastThread.h b/services/audioflinger/FastThread.h
index cb32e9d..e8eaf39 100644
--- a/services/audioflinger/FastThread.h
+++ b/services/audioflinger/FastThread.h
@@ -63,7 +63,7 @@
     FastThreadDumpState *mDummyDumpState;
     FastThreadDumpState *dumpState;
     bool ignoreNextOverrun;  // used to ignore initial overrun and first after an underrun
-#ifdef FAST_MIXER_STATISTICS
+#ifdef FAST_THREAD_STATISTICS
     struct timespec oldLoad;    // previous value of clock_gettime(CLOCK_THREAD_CPUTIME_ID)
     bool oldLoadValid;  // whether oldLoad is valid
     uint32_t bounds;