sh: Make sure all SH-X3 cores are populated in the present CPU map.

This iterates over the maximum number of CPUs we plan to support and
makes sure they're all set in the present CPU map.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

arch/sh/kernel/cpu/sh4a/smp-shx3.c

@@ -74,6 +74,9 @@ static void shx3_prepare_cpus(unsigned int max_cpus)
 	for (i = 0; i < SMP_MSG_NR; i++)
 		request_irq(104 + i, ipi_interrupt_handler,
 			    IRQF_DISABLED | IRQF_PERCPU, "IPI", (void *)(long)i);
+
+	for (i = 0; i < max_cpus; i++)
+		set_cpu_present(i, true);
 }
 
 static void shx3_start_cpu(unsigned int cpu, unsigned long entry_point)