ARM: mxs: Remove init_irq declaration in machine description

Commit ebafed7a ("ARM: irq: Call irqchip_init if no init_irq function is
specified") removed the need to explictly setup the init_irq field in
the machine description when using only irqchip_init. Remove that
declaration for mxs as well.
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/mach-mxs/mach-mxs.c

@@ -19,7 +19,6 @@
 #include <linux/err.h>
 #include <linux/gpio.h>
 #include <linux/init.h>
-#include <linux/irqchip.h>
 #include <linux/irqchip/mxs.h>
 #include <linux/micrel_phy.h>
 #include <linux/of_address.h>
@@ -435,7 +434,6 @@ static const char *mxs_dt_compat[] __initdata = {
 
 DT_MACHINE_START(MXS, "Freescale MXS (Device Tree)")
 	.map_io		= debug_ll_io_init,
-	.init_irq	= irqchip_init,
 	.handle_irq	= icoll_handle_irq,
 	.init_time	= mxs_timer_init,
 	.init_machine	= mxs_machine_init,