arch/x86/xen/setup: Cleanup code/data sections definitions

Cleanup code/data sections definitions
accordingly to include/linux/init.h.

Signed-off-by: Daniel Kiper <dkiper@net-space.pl>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
diff --git a/arch/x86/xen/setup.c b/arch/x86/xen/setup.c
index 90bac0a..d3663df 100644
--- a/arch/x86/xen/setup.c
+++ b/arch/x86/xen/setup.c
@@ -50,7 +50,7 @@
  */
 #define EXTRA_MEM_RATIO		(10)
 
-static __init void xen_add_extra_mem(unsigned long pages)
+static void __init xen_add_extra_mem(unsigned long pages)
 {
 	unsigned long pfn;
 
@@ -336,7 +336,7 @@
 #endif
 }
 
-static __cpuinit int register_callback(unsigned type, const void *func)
+static int __cpuinit register_callback(unsigned type, const void *func)
 {
 	struct callback_register callback = {
 		.type = type,