[S390] Get rid of ARCH_KMALLOC_MINALIGN.

slab cache debugging code has been changed so that we always get a
minimum alignment of the alignment of a 64-integer. Since this is
8 on s390/s390x there is no need of ARCH_KMALLOC_MINALIGN anymore.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

include/asm-s390/cache.h

@@ -14,8 +14,6 @@
 #define L1_CACHE_BYTES     256
 #define L1_CACHE_SHIFT     8
 
-#define ARCH_KMALLOC_MINALIGN	8
-
 #define __read_mostly __attribute__((__section__(".data.read_mostly")))
 
 #endif