minor update to kernels
minor update to kernels

bragadeesh/rocFFT,bragadeesh/rocFFT,ROCmSoftwarePlatform/rocFFT,tingxingdong/rocFFT-1,bragadeesh/rocFFT,tingxingdong/rocFFT-1,ROCmSoftwarePlatform/rocFFT,tingxingdong/rocFFT-1,ROCmSoftwarePlatform/rocFFT,ROCmSoftwarePlatform/rocFFT