ARM: use common irqchip_init for GIC init

Convert all GIC DT initialization over to use common irqchip_init
function.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: David Brown <davidb@codeaurora.org>
Cc: Daniel Walker <dwalker@fifo99.com>
Cc: Bryan Huntsman <bryanh@codeaurora.org>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Magnus Damm <magnus.damm@gmail.com>
Cc: Dinh Nguyen <dinguyen@altera.com>
Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: Shiraz Hashim <shiraz.hashim@st.com>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>
Cc: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-shmobile/setup-emev2.c

@@ -20,13 +20,13 @@
 #include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
+#include <linux/irqchip.h>
 #include <linux/platform_device.h>
 #include <linux/platform_data/gpio-em.h>
 #include <linux/of_platform.h>
 #include <linux/delay.h>
 #include <linux/input.h>
 #include <linux/io.h>
-#include <linux/of_irq.h>
 #include <mach/hardware.h>
 #include <mach/common.h>
 #include <mach/emev2.h>
@@ -445,26 +445,16 @@ void __init emev2_add_standard_devices_dt(void)
 			     emev2_auxdata_lookup, NULL);
 }
 
-static const struct of_device_id emev2_dt_irq_match[] = {
-	{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
-	{},
-};
-
 static const char *emev2_boards_compat_dt[] __initdata = {
 	"renesas,emev2",
 	NULL,
 };
 
-void __init emev2_init_irq_dt(void)
-{
-	of_irq_init(emev2_dt_irq_match);
-}
-
 DT_MACHINE_START(EMEV2_DT, "Generic Emma Mobile EV2 (Flattened Device Tree)")
 	.smp		= smp_ops(emev2_smp_ops),
 	.init_early	= emev2_init_delay,
 	.nr_irqs	= NR_IRQS_LEGACY,
-	.init_irq	= emev2_init_irq_dt,
+	.init_irq	= irqchip_init,
 	.init_machine	= emev2_add_standard_devices_dt,
 	.timer		= &shmobile_timer,
 	.dt_compat	= emev2_boards_compat_dt,