[IA64] add init declaration - gate page functions

Add init declaration to bunch of patch functions and gate
page setup function.

Signed-off-by: Ken Chen <kenneth.w.chen@intel.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/mm/init.c

@@ -294,7 +294,7 @@ put_kernel_page (struct page *page, unsigned long address, pgprot_t pgprot)
 	return page;
 }
 
-static void
+static void __init
 setup_gate (void)
 {
 	struct page *page;