[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>
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 3748768..e3a1000 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -294,7 +294,7 @@
 	return page;
 }
 
-static void
+static void __init
 setup_gate (void)
 {
 	struct page *page;