Use the two-operand form of DCBT on all PPC970 regardless of OS
There seems to be no advantage to the three-operand form used in the earliest GotoBLAS kernels, and it causes compilation problems  on other than the previously special-cased platforms as well
@@ -241,7 +241,7 @@ static inline int blas_quickdivide(blasint x, blasint y){
#define HAVE_PREFETCH
#endif
-#if defined(POWER3) || defined(POWER6) || defined(PPCG4) || defined(CELL) || defined(POWER8) || defined(POWER9) || ( defined(PPC970) && ( defined(OS_DARWIN) || defined(OS_FREEBSD) ) )
+#if defined(POWER3) || defined(POWER6) || defined(PPCG4) || defined(CELL) || defined(POWER8) || defined(POWER9) || defined(PPC970)
#define DCBT_ARG 0
#else
#define DCBT_ARG 8
