ARC: remove @init_time, @init_irq platform callbacks

 * @dt_compat:		Array of device tree 'compatible' strings

 * 			(XXX: although only 1st entry is looked at)

 * @init_early:		Very early callback [called from setup_arch()]

 * @init_irq:		setup external IRQ controllers [called from init_IRQ()]

 * @init_smp:		for each CPU (e.g. setup IPI)

 * 			[(M):init_IRQ(), (o):start_kernel_secondary()]

 * @init_time:		platform specific clocksource/clockevent registration

 * 			[called from time_init()]

 * @init_machine:	arch initcall level callback (e.g. populate static

 * 			platform devices or parse Devicetree)

 * @init_late:		Late initcall level callback

struct machine_desc {

	const char		*name;

	const char		**dt_compat;

	void			(*init_early)(void);

	void			(*init_irq)(void);

#ifdef CONFIG_SMP

	void			(*init_smp)(unsigned int);

#endif

	void			(*init_time)(void);

	void			(*init_machine)(void);

	void			(*init_late)(void);

 */

void __init init_IRQ(void)

{

	/* Any external intc can be setup here */

	if (machine_desc->init_irq)

		machine_desc->init_irq();

	/* process the entire interrupt tree in one go */

	/*

	 * process the entire interrupt tree in one go

	 * Any external intc will be setup provided DT chains them

	 * properly

	 */

	irqchip_init();

#ifdef CONFIG_SMP

	/* sets up the periodic event timer */

	arc_local_timer_setup();

	if (machine_desc->init_time)

		machine_desc->init_time();

}