Fix build warnings

Change-Id: I33178dbe0bfc087d6599579ca0529ad853c669ed
diff --git a/services/audioflinger/AudioResamplerSinc.cpp b/services/audioflinger/AudioResamplerSinc.cpp
index f600d6c..320b8cf 100644
--- a/services/audioflinger/AudioResamplerSinc.cpp
+++ b/services/audioflinger/AudioResamplerSinc.cpp
@@ -141,6 +141,8 @@
 
 // ----------------------------------------------------------------------------
 
+#if !USE_NEON
+
 static inline
 int32_t mulRL(int left, int32_t in, uint32_t vRL)
 {
@@ -202,6 +204,8 @@
 #endif
 }
 
+#endif // !USE_NEON
+
 // ----------------------------------------------------------------------------
 
 AudioResamplerSinc::AudioResamplerSinc(