mips: Use common threadinfo allocator

No point in using kmalloc for allocating 0, 1 resp. 2 pages for
threadinfo.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Link: http://lkml.kernel.org/r/20120505150141.936950979@linutronix.de

arch/mips/include/asm/thread_info.h

@@ -85,18 +85,6 @@ register struct thread_info *__current_thread_info __asm__("$28");
 
 #define STACK_WARN	(THREAD_SIZE / 8)
 
-#define __HAVE_ARCH_THREAD_INFO_ALLOCATOR
-
-#ifdef CONFIG_DEBUG_STACK_USAGE
-#define alloc_thread_info_node(tsk, node) \
-		kzalloc_node(THREAD_SIZE, GFP_KERNEL, node)
-#else
-#define alloc_thread_info_node(tsk, node) \
-		kmalloc_node(THREAD_SIZE, GFP_KERNEL, node)
-#endif
-
-#define free_thread_info(info) kfree(info)
-
 #endif /* !__ASSEMBLY__ */
 
 #define PREEMPT_ACTIVE		0x10000000