xtensa: move init_mmu declaration to mmu_context.h

Secondary CPUs need this declaration to initialize their MMUs.

Signed-off-by: Max Filippov <[e-mail]>
Signed-off-by: Chris Zankel <[e-mail]>

arch/xtensa/include/asm/mmu_context.h

···
 #define ASID_MASK	((1 << XCHAL_MMU_ASID_BITS) - 1)
 #define ASID_INSERT(x)	(0x03020001 | (((x) & ASID_MASK) << 8))
 
+#ifdef CONFIG_MMU
+void init_mmu(void);
+#else
+static inline void init_mmu(void) { }
+#endif
+
 static inline void set_rasid_register (unsigned long val)
 {
 	__asm__ __volatile__ (" wsr %0, rasid\n\t"

arch/xtensa/kernel/setup.c

···
 #endif
 
 #include <asm/bootparam.h>
+#include <asm/mmu_context.h>
 #include <asm/pgtable.h>
 #include <asm/processor.h>
 #include <asm/timex.h>
···
 #endif
 
 sysmem_info_t __initdata sysmem;
-
-#ifdef CONFIG_MMU
-extern void init_mmu(void);
-#else
-static inline void init_mmu(void) { }
-#endif
 
 extern int mem_reserve(unsigned long, unsigned long, int);
 extern void bootmem_init(void);