arm: omap: irq: drop ti,intc-size support

we don't need that anymore since specific
devices are passing correct compatible flags.
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/irq.c

@@ -313,9 +313,6 @@ static int __init intc_of_init(struct device_node *node,
 	if (of_device_is_compatible(node, "ti,am33xx-intc"))
 		nr_irq = 128;
 
-	if (of_property_read_u32(node, "ti,intc-size", &nr_irq))
-		pr_warn("unable to get intc-size, default to %d\n", nr_irq);
-
 	omap_init_irq(res.start, nr_irq, of_node_get(node));
 
 	set_handle_irq(omap2_intc_handle_irq);