Temporarily revert to the old nrm2 kernels

kernel/arm64/KERNEL.THUNDERX2T99

@@ -153,12 +153,12 @@ IDAMAXKERNEL   = iamax_thunderx2t99.c
 ICAMAXKERNEL   = izamax_thunderx2t99.c
 IZAMAXKERNEL   = izamax_thunderx2t99.c
 
-SNRM2KERNEL    = scnrm2_thunderx2t99.c
-CNRM2KERNEL    = scnrm2_thunderx2t99.c
+SNRM2KERNEL    = nrm2.S
+CNRM2KERNEL    = nrm2.S
 #DNRM2KERNEL    = dznrm2_thunderx2t99_fast.c
 #ZNRM2KERNEL    = dznrm2_thunderx2t99_fast.c
-DNRM2KERNEL    = dznrm2_thunderx2t99.c
-ZNRM2KERNEL    = dznrm2_thunderx2t99.c
+DNRM2KERNEL    = znrm2.S
+ZNRM2KERNEL    = znrm2.S
 
 
 DDOTKERNEL     = dot_thunderx2t99.c