[SPARC64]: Report mondo error correctly in hypervisor_xcall_deliver().

It's in "arg0" not "func".
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

arch/sparc64/kernel/smp.c

@@ -617,7 +617,7 @@ static void hypervisor_xcall_deliver(u64 data0, u64 data1, u64 data2, cpumask_t
 
 		if (unlikely(++retries > 100)) {
 			printk("CPU[%d]: sun4v mondo error %lu\n",
-			       this_cpu, func);
+			       this_cpu, arg0);
 			break;
 		}