ARM: versatile: remove init_irq hook for DT boot

Now that versatile's irqchips are initialized from DT, the init_irq hook
can be removed.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>

arch/arm/mach-versatile/versatile_dt.c

@@ -44,7 +44,6 @@ static const char *versatile_dt_match[] __initconst = {
 DT_MACHINE_START(VERSATILE_PB, "ARM-Versatile (Device Tree Support)")
 	.map_io		= versatile_map_io,
 	.init_early	= versatile_init_early,
-	.init_irq	= versatile_init_irq,
 	.init_machine	= versatile_dt_init,
 	.dt_compat	= versatile_dt_match,
 	.restart	= versatile_restart,