MIPS: TX49xx: Define ARCH_KMALLOC_MINALIGN

With SLAB, it works without ARCH_KMALLOC_MINALIGN, but with SLOB/SLUB,
ARCH_KMALLOC_MINALIGN is required to ensure alignment of kmalloced
buffer.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/1248/Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

arch/mips/include/asm/mach-tx49xx/kmalloc.h

 #ifndef __ASM_MACH_TX49XX_KMALLOC_H
 #define __ASM_MACH_TX49XX_KMALLOC_H
 
-/*
- * All happy, no need to define ARCH_KMALLOC_MINALIGN
- */
+#define ARCH_KMALLOC_MINALIGN	L1_CACHE_BYTES
 
 #endif /* __ASM_MACH_TX49XX_KMALLOC_H */