m68k/amiga: Mark z_dev_present() __init

It's called from amiga_init_devices() only, which is __init.

Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
diff --git a/arch/m68k/amiga/platform.c b/arch/m68k/amiga/platform.c
index 7fd8b41..1b8db5c 100644
--- a/arch/m68k/amiga/platform.c
+++ b/arch/m68k/amiga/platform.c
@@ -57,7 +57,7 @@
 subsys_initcall(amiga_init_bus);
 
 
-static int z_dev_present(zorro_id id)
+static int __init z_dev_present(zorro_id id)
 {
 	unsigned int i;