[IA64] vmcore_find_descriptor_size should be in __init

vmcore_find_descriptor_size() is only called by
reserve_elfcorehdr(), which is in __init, so it seems to me that
vmcore_find_descriptor_size() should be there too.
Signed-off-by: Simon Horman <horms@verge.net.au>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/efi.c

@@ -1231,7 +1231,7 @@ kdump_find_rsvd_region (unsigned long size,
 
 #ifdef CONFIG_PROC_VMCORE
 /* locate the size find a the descriptor at a certain address */
-unsigned long
+unsigned long __init
 vmcore_find_descriptor_size (unsigned long address)
 {
 	void *efi_map_start, *efi_map_end, *p;