arm: omap: irq: add specific compatibles for omap3 and am33xx devices

with this, we can use a compatible flag to figure
out how many irq lines are wired up, no need for
our TI-specific ti,intc-size binding.
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/irq.c

@@ -320,7 +320,9 @@ static int __init intc_of_init(struct device_node *node,
 	return 0;
 }
 
-IRQCHIP_DECLARE(omap_intc, "ti,omap2-intc", intc_of_init);
+IRQCHIP_DECLARE(omap2_intc, "ti,omap2-intc", intc_of_init);
+IRQCHIP_DECLARE(omap3_intc, "ti,omap3-intc", intc_of_init);
+IRQCHIP_DECLARE(am33xx_intc, "ti,am33xx-intc", intc_of_init);
 
 asmlinkage void __exception_irq_entry omap3_intc_handle_irq(struct pt_regs *regs)
 {