Fix caxpy/zaxpy for big-endian

kernel/power/KERNEL.PPCG4

@@ -15,8 +15,13 @@ ZASUMKERNEL	= zasum_ppc440.S
 
 SAXPYKERNEL	=  axpy_ppc440.S
 DAXPYKERNEL	=  axpy_ppc440.S
+ifneq ($(__BYTE_ORDER__),__ORDER_BIG_ENDIAN__)
 CAXPYKERNEL	= zaxpy_ppc440.S
 ZAXPYKERNEL	= zaxpy_ppc440.S
+else
+CAXPYKERNEL    = ../arm/zaxpy.c
+ZAXPYKERNEL    = ../arm/zaxpy.c
+endif
 
 SDOTKERNEL	=  dot_ppc440.S
 DDOTKERNEL	=  dot_ppc440.S