ia64: convert last user of smp_call_function_mask

smp_call_function_many is the new version: it takes a pointer.  Also,
use mm accessor macro while we're changing this.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c
index 93ebfea..dabeefe 100644
--- a/arch/ia64/kernel/smp.c
+++ b/arch/ia64/kernel/smp.c
@@ -302,7 +302,7 @@
 		return;
 	}
 
-	smp_call_function_mask(mm->cpu_vm_mask,
+	smp_call_function_many(mm_cpumask(mm),
 		(void (*)(void *))local_finish_flush_tlb_mm, mm, 1);
 	local_irq_disable();
 	local_finish_flush_tlb_mm(mm);