xen/arm: actually pass a non-NULL percpu pointer to request_percpu_irq

commit 2798ba7d upstream.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Reviewed-by: Ian Campbell <ian.camjpbell@citrix.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/xen/enlighten.c

@@ -239,7 +239,7 @@ static int __init xen_init_events(void)
 	xen_init_IRQ();
 
 	if (request_percpu_irq(xen_events_irq, xen_arm_callback,
-			"events", xen_vcpu)) {
+			"events", &xen_vcpu)) {
 		pr_err("Error requesting IRQ %d\n", xen_events_irq);
 		return -EINVAL;
 	}