[IA64] kprobes arch consolidation build fix

ia64 named their handler kprobes_fault_handler while all other
arches used kprobe_fault_handler.  Change the function definition
and header declaration.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/mm/fault.c b/arch/ia64/mm/fault.c
index 3e69881..23088be 100644
--- a/arch/ia64/mm/fault.c
+++ b/arch/ia64/mm/fault.c
@@ -26,7 +26,7 @@
 	if (!user_mode(regs)) {
 		/* kprobe_running() needs smp_processor_id() */
 		preempt_disable();
-		if (kprobe_running() && kprobes_fault_handler(regs, trap))
+		if (kprobe_running() && kprobe_fault_handler(regs, trap))
 			ret = 1;
 		preempt_enable();
 	}