Really revert xDOT changes from 1832

neglected to rebase #1892 on merging

Author: martin-frbg

kernel/mips64/KERNEL

@@ -6,12 +6,8 @@ CROTKERNEL  = ../mips/zrot.c
 ZROTKERNEL  = ../mips/zrot.c
 CSWAPKERNEL = ../mips/zswap.c
 ZSWAPKERNEL = ../mips/zswap.c
-SDOTKERNEL   = ../mips/dot.c                                                                                        
-DDOTKERNEL   = ../mips/dot.c                                                                                        
-CDOTKERNEL   = ../mips/zdot.c                                                                                       
-ZDOTKERNEL   = ../mips/zdot.c    
-
-
+                                                                                        
+                                                                                                                                          
 ifndef SNRM2KERNEL
 SNRM2KERNEL = snrm2.S
 endif