ARM: EXYNOS: Remove custom init_irq callbacks

Since both exynos4_init_irq() and exynos5_init_irq() are just calling
irqchip_init(), there is no need for them to exist any more, since this
is the default that is called when init_irq callback is not specified.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/common.c

@@ -400,16 +400,6 @@ void __init exynos_init_time(void)
 	clocksource_of_init();
 }
 
-void __init exynos4_init_irq(void)
-{
-	irqchip_init();
-}
-
-void __init exynos5_init_irq(void)
-{
-	irqchip_init();
-}
-
 struct bus_type exynos_subsys = {
 	.name		= "exynos-core",
 	.dev_name	= "exynos-core",

arch/arm/mach-exynos/common.h

@@ -20,8 +20,6 @@ extern unsigned long xxti_f, xusbxti_f;
 
 struct map_desc;
 void exynos_init_io(struct map_desc *mach_desc, int size);
-void exynos4_init_irq(void);
-void exynos5_init_irq(void);
 void exynos4_restart(char mode, const char *cmd);
 void exynos5_restart(char mode, const char *cmd);
 void exynos_init_late(void);

arch/arm/mach-exynos/mach-exynos4-dt.c

@@ -55,7 +55,6 @@ static void __init exynos4_reserve(void)
 DT_MACHINE_START(EXYNOS4210_DT, "Samsung Exynos4 (Flattened Device Tree)")
 	/* Maintainer: Thomas Abraham <thomas.abraham@linaro.org> */
 	.smp		= smp_ops(exynos_smp_ops),
-	.init_irq	= exynos4_init_irq,
 	.map_io		= exynos4_dt_map_io,
 	.init_early	= exynos_firmware_init,
 	.init_machine	= exynos4_dt_machine_init,

arch/arm/mach-exynos/mach-exynos5-dt.c

@@ -76,7 +76,6 @@ static void __init exynos5_reserve(void)
 
 DT_MACHINE_START(EXYNOS5_DT, "SAMSUNG EXYNOS5 (Flattened Device Tree)")
 	/* Maintainer: Kukjin Kim <kgene.kim@samsung.com> */
-	.init_irq	= exynos5_init_irq,
 	.smp		= smp_ops(exynos_smp_ops),
 	.map_io		= exynos5_dt_map_io,
 	.init_machine	= exynos5_dt_machine_init,