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-bcm/board_bcm.c

@@ -11,22 +11,15 @@
  * GNU General Public License for more details.
  */
 
-#include <linux/of_irq.h>
 #include <linux/of_platform.h>
 #include <linux/init.h>
 #include <linux/device.h>
 #include <linux/platform_device.h>
+#include <linux/irqchip.h>
 
 #include <asm/mach/arch.h>
-#include <asm/hardware/gic.h>
-
 #include <asm/mach/time.h>
 
-static const struct of_device_id irq_match[] = {
-	{.compatible = "arm,cortex-a9-gic", .data = gic_of_init, },
-	{}
-};
-
 static void timer_init(void)
 {
 }
@@ -35,11 +28,6 @@ static struct sys_timer timer = {
 	.init = timer_init,
 };
 
-static void __init init_irq(void)
-{
-	of_irq_init(irq_match);
-}
-
 static void __init board_init(void)
 {
 	of_platform_populate(NULL, of_default_bus_match_table, NULL,
@@ -49,7 +37,7 @@ static void __init board_init(void)
 static const char * const bcm11351_dt_compat[] = { "bcm,bcm11351", NULL, };
 
 DT_MACHINE_START(BCM11351_DT, "Broadcom Application Processor")
-	.init_irq = init_irq,
+	.init_irq = irqchip_init,
 	.timer = &timer,
 	.init_machine = board_init,
 	.dt_compat = bcm11351_dt_compat,