irqchip: Add include guard to irq-partition-percpu.h

Add a header include guard just in case.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>

include/linux/irqchip/irq-partition-percpu.h

@@ -4,6 +4,9 @@
  * Author: Marc Zyngier <marc.zyngier@arm.com>
  */
 
+#ifndef __LINUX_IRQCHIP_IRQ_PARTITION_PERCPU_H
+#define __LINUX_IRQCHIP_IRQ_PARTITION_PERCPU_H
+
 #include <linux/fwnode.h>
 #include <linux/cpumask.h>
 #include <linux/irqdomain.h>
@@ -46,3 +49,5 @@ struct irq_domain *partition_get_domain(struct partition_desc *dsc)
 	return NULL;
 }
 #endif
+
+#endif /* __LINUX_IRQCHIP_IRQ_PARTITION_PERCPU_H */