arm: omap: irq: use compatible flag to figure out number of IRQ lines

so far, only am33xx has 128 lines, all other devices
have only 96.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/irq.c

@@ -310,6 +310,9 @@ static int __init intc_of_init(struct device_node *node,
 		return -EINVAL;
 	}
 
+	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);