irqchip/sunxi-nmi: Switch to of_io_request_and_map() from of_iomap()

Switch to the new of_io_request_and_map() call, so the IO resource is
properly held, and also shows up in /proc/iomem.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: http://lkml.kernel.org/r/1444063334-19832-3-git-send-email-wens@csie.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

drivers/irqchip/irq-sunxi-nmi.c

@@ -153,7 +153,7 @@ static int __init sunxi_sc_nmi_irq_init(struct device_node *node,
 	}
 
 	gc = irq_get_domain_generic_chip(domain, 0);
-	gc->reg_base = of_iomap(node, 0);
+	gc->reg_base = of_io_request_and_map(node, 0, of_node_full_name(node));
 	if (!gc->reg_base) {
 		pr_err("unable to map resource\n");
 		ret = -ENOMEM;