x86: move page related declaration

end_pfn is in page.h, so end_pfn_map has a place there as well

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/asm-x86/page_64.h b/include/asm-x86/page_64.h
index c3b52bc..6fdc904 100644
--- a/include/asm-x86/page_64.h
+++ b/include/asm-x86/page_64.h
@@ -41,6 +41,7 @@
 #ifndef __ASSEMBLY__
 
 extern unsigned long end_pfn;
+extern unsigned long end_pfn_map;
 
 void clear_page(void *);
 void copy_page(void *, void *);