arm: omap: irq: call set_handle_irq() from .init_irq

the idea is that board-files won't need to set
.handle_irq on their machine_descs, which lets
us drop a little more pointless code.
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/irq.c

@@ -284,16 +284,19 @@ asmlinkage void __exception_irq_entry omap2_intc_handle_irq(struct pt_regs *regs
 void __init omap2_init_irq(void)
 {
 	omap_init_irq(OMAP24XX_IC_BASE, 96, NULL);
+	set_handle_irq(omap2_intc_handle_irq);
 }
 
 void __init omap3_init_irq(void)
 {
 	omap_init_irq(OMAP34XX_IC_BASE, 96, NULL);
+	set_handle_irq(omap2_intc_handle_irq);
 }
 
 void __init ti81xx_init_irq(void)
 {
 	omap_init_irq(OMAP34XX_IC_BASE, 128, NULL);
+	set_handle_irq(omap2_intc_handle_irq);
 }
 
 static int __init intc_of_init(struct device_node *node,