x86, mm: Move after_bootmem to mm_internel.h

it is only used in arch/x86/mm/init*.c

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Link: http://lkml.kernel.org/r/1353123563-3103-41-git-send-email-yinghai@kernel.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
diff --git a/arch/x86/mm/mm_internal.h b/arch/x86/mm/mm_internal.h
index dc79ac1..6b563a1 100644
--- a/arch/x86/mm/mm_internal.h
+++ b/arch/x86/mm/mm_internal.h
@@ -14,4 +14,6 @@
 					     unsigned long page_size_mask);
 void zone_sizes_init(void);
 
+extern int after_bootmem;
+
 #endif	/* __X86_MM_INTERNAL_H */