Fix return type to be void.

dl/sp/src/arm/arm64/omxSP_FFTInv_CToC_FC32.c

 /*
  *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 48 matching lines @@
 extern void armSP_FFTInv_CToC_FC32_Radix8_fs_OutOfPlace(
     const OMX_FC32* pSrc,
     OMX_FC32* pDst,
     OMX_FC32* pTwiddle,
     long* subFFTNum,
     long* subFFTSize);
 
 /*
  * Scale FFT data by 1/|length|. |length| must be a power of two
  */
-static inline ScaleFFTData(OMX_FC32* fftData, unsigned length) {
+static inline void ScaleFFTData(OMX_FC32* fftData, unsigned length) {
   float32_t* data = (float32_t*)fftData;
   float32_t scale = 1.0f / length;
 
   /*
    * Do two complex elements at a time because |length| is always
    * greater than or equal to 2 (order >= 1)
    */
   do {
     float32x4_t x = vld1q_f32(data);
 
@@ skipping 125 matching lines @@
         pOut, pDst, pTwiddle, &subFFTNum, &subFFTSize);
   } else {
     /* Order = 1 */
     armSP_FFTInv_CToC_FC32_Radix2_fs_OutOfPlace(
         pSrc, pDst, pTwiddle, &subFFTNum, &subFFTSize);
   }
 
   ScaleFFTData(pDst, spec->N);
   return OMX_Sts_NoErr;
 }