[IA64] ia64/mm/init.c: fix section mismatches

This patch fixes the following section mismatches:

<--  snip  -->

...
WARNING: vmlinux.o(.text+0x5b5c2): Section mismatch: reference to .init.text:memmap_init_zone (between 'memmap_init' and 'virtual_memmap_init')
WARNING: vmlinux.o(.text+0x5b842): Section mismatch: reference to .init.text:memmap_init_zone (between 'virtual_memmap_init' and 'ia64_mmu_init')
...

<--  snip  -->
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/mm/init.c

@@ -472,7 +472,7 @@ struct memmap_init_callback_data {
 	unsigned long zone;
 };
 
-static int
+static int __meminit
 virtual_memmap_init (u64 start, u64 end, void *arg)
 {
 	struct memmap_init_callback_data *args;
@@ -503,7 +503,7 @@ virtual_memmap_init (u64 start, u64 end, void *arg)
 	return 0;
 }
 
-void
+void __meminit
 memmap_init (unsigned long size, int nid, unsigned long zone,
 	     unsigned long start_pfn)
 {