nds32: use asm-generic/mmu_context.h for no-op implementations

Signed-off-by: Nicholas Piggin <[e-mail]>
Acked-by: Greentime Hu <[e-mail]>
Cc: Nick Hu <[e-mail]>
Cc: Vincent Chen <[e-mail]>
Signed-off-by: Arnd Bergmann <[e-mail]>

arch/nds32/include/asm/mmu_context.h

···
 #include <asm/proc-fns.h>
 #include <asm-generic/mm_hooks.h>
 
+#define init_new_context init_new_context
 static inline int
 init_new_context(struct task_struct *tsk, struct mm_struct *mm)
 {
 	mm->context.id = 0;
 	return 0;
 }
-
-#define destroy_context(mm)	do { } while(0)
 
 #define CID_BITS	9
 extern spinlock_t cid_lock;
···
 		__new_context(mm);
 }
 
-static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
-{
-}
-
 static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next,
 			     struct task_struct *tsk)
 {
···
 	}
 }
 
-#define deactivate_mm(tsk,mm)	do { } while (0)
-#define activate_mm(prev,next)	switch_mm(prev, next, NULL)
+#include <asm-generic/mmu_context.h>
 
 #endif