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-tegra/common.c

@@ -21,10 +21,9 @@
 #include <linux/io.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
-#include <linux/of_irq.h>
+#include <linux/irqchip.h>
 
 #include <asm/hardware/cache-l2x0.h>
-#include <asm/hardware/gic.h>
 
 #include <mach/powergate.h>
 
@@ -57,15 +56,10 @@ u32 tegra_uart_config[4] = {
 };
 
 #ifdef CONFIG_OF
-static const struct of_device_id tegra_dt_irq_match[] __initconst = {
-	{ .compatible = "arm,cortex-a9-gic", .data = gic_of_init },
-	{ }
-};
-
 void __init tegra_dt_init_irq(void)
 {
 	tegra_init_irq();
-	of_irq_init(tegra_dt_irq_match);
+	irqchip_init();
 }
 #endif