ARC: [Review] Multi-platform image #3: switch to board callback

-platform API is retired and instead callbacks are used

Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>

arch/arc/kernel/irq.c

@@ -124,7 +124,6 @@ void __init init_onchip_IRQ(void)
 void __init init_IRQ(void)
 {
 	init_onchip_IRQ();
-	plat_init_IRQ();
 
 	/* Any external intc can be setup here */
 	if (machine_desc->init_irq)
@@ -132,7 +131,6 @@ void __init init_IRQ(void)
 
 #ifdef CONFIG_SMP
 	/* Master CPU can initialize it's side of IPI */
-	arc_platform_smp_init_cpu();
 	if (machine_desc->init_smp)
 		machine_desc->init_smp(smp_processor_id());
 #endif