mca_nmi_hook() can be called at any point

... and having it __init is a bad idea.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Adrian Bunk <bunk@stusta.de>

arch/i386/mach-default/setup.c

@@ -101,7 +101,7 @@ void __init time_init_hook(void)
  *	along the MCA bus.  Use this to hook into that chain if you will need
  *	it.
  **/
-void __init mca_nmi_hook(void)
+void mca_nmi_hook(void)
 {
 	/* If I recall correctly, there's a whole bunch of other things that
 	 * we can do to check for NMI problems, but that's all I know about