[PATCH] x86_64: Eliminate register_die_notifier symbol exported

register_die_notifier is exported twice, once in traps.c and once in
x8664_ksyms.c.  This results in a warning on build.
Signed-off-by: NKevin Winchester <kwin@ns.sympatico.ca>
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>

arch/x86_64/kernel/x8664_ksyms.c

@@ -144,7 +144,6 @@ EXPORT_SYMBOL(rwsem_down_write_failed_thunk);
 EXPORT_SYMBOL(empty_zero_page);
 
 EXPORT_SYMBOL(die_chain);
-EXPORT_SYMBOL(register_die_notifier);
 
 #ifdef CONFIG_SMP
 EXPORT_SYMBOL(cpu_sibling_map);