of/irq: Replace of_irq with of_phandle_args

struct of_irq and struct of_phandle_args are exactly the same structure.
This patch makes the kernel use of_phandle_args everywhere. This in
itself isn't a big deal, but it makes some follow-on patches simpler.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Acked-by: Michal Simek <monstr@monstr.eu>
Acked-by: Tony Lindgren <tony@atomide.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>

arch/powerpc/sysdev/mpic_msi.c

@@ -35,7 +35,7 @@ static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic)
 	const struct irq_domain_ops *ops = mpic->irqhost->ops;
 	struct device_node *np;
 	int flags, index, i;
-	struct of_irq oirq;
+	struct of_phandle_args oirq;
 
 	pr_debug("mpic: found U3, guessing msi allocator setup\n");
 
@@ -64,8 +64,8 @@ static int mpic_msi_reserve_u3_hwirqs(struct mpic *mpic)
 
 		index = 0;
 		while (of_irq_parse_one(np, index++, &oirq) == 0) {
-			ops->xlate(mpic->irqhost, NULL, oirq.specifier,
-						oirq.size, &hwirq, &flags);
+			ops->xlate(mpic->irqhost, NULL, oirq.args,
+						oirq.args_count, &hwirq, &flags);
 			msi_bitmap_reserve_hwirq(&mpic->msi_bitmap, hwirq);
 		}
 	}