added some FFTW handling

hardware_settings.h

@@ -32,6 +32,8 @@
 #define __PREFIX(c) hip##c
 #define __CREATE_HANDLE(h)  rocblas_create_handle(h)
 #define __DESTROY_HANDLE(h) rocblas_destroy_handle(h)
+#define __DESTROY_PLAN(p) rocfft_plan_destroy(p)
+#define __FFTW_PLAN rocfft_plan
 #endif
 
 #ifdef CUDA
@@ -49,4 +51,6 @@
 #define __PREFIX(c) cuda##c
 #define __CREATE_HANDLE(h)  cublasCreate(h)
 #define __DESTROY_HANDLE(h) cublasDestroy(h)
+#define __DESTROY_PLAN(p) cufftDestroy(p)
+#define __FFTW_PLAN cufftHandle
 #endif