SGEMM: fix bug in PSIMD kernel
SGEMM: fix bug in PSIMD kernel

convercraft/NNPACK,microblink/NNPACK,Maratyszcza/NNPACK,Maratyszcza/NNPACK,convercraft/NNPACK,convercraft/NNPACK,microblink/NNPACK,Maratyszcza/NNPACK,convercraft/NNPACK,microblink/NNPACK,Maratyszcza/NNPACK,microblink/NNPACK