message: Remove hardwired selection of M4 microprocessor architecture from CMSIS
  preprocessor.
diff: @@ -14,7 +14,6 @@ limitations under the License.
  ==============================================================================*/
  extern "C" {
  -#define ARM_MATH_CM4
  #define IFFT_FLAG_R 0
  #define BIT_REVERSE_FLAG 1
  #define FFT_SIZE 512
  