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>
diff --git a/arch/arm/mach-spear13xx/spear1310.c b/arch/arm/mach-spear13xx/spear1310.c
index 295bb04..5de3e6f 100644
--- a/arch/arm/mach-spear13xx/spear1310.c
+++ b/arch/arm/mach-spear13xx/spear1310.c
@@ -14,9 +14,9 @@
 #define pr_fmt(fmt) "SPEAr1310: " fmt
 
 #include <linux/amba/pl022.h>
+#include <linux/irqchip.h>
 #include <linux/of_platform.h>
 #include <linux/pata_arasan_cf_data.h>
-#include <asm/hardware/gic.h>
 #include <asm/mach/arch.h>
 #include <asm/mach/map.h>
 #include <mach/generic.h>
@@ -90,7 +90,7 @@
 DT_MACHINE_START(SPEAR1310_DT, "ST SPEAr1310 SoC with Flattened Device Tree")
 	.smp		=	smp_ops(spear13xx_smp_ops),
 	.map_io		=	spear1310_map_io,
-	.init_irq	=	spear13xx_dt_init_irq,
+	.init_irq	=	irqchip_init,
 	.timer		=	&spear13xx_timer,
 	.init_machine	=	spear1310_dt_init,
 	.restart	=	spear_restart,