irqchip/irq-imx-gpcv2: Clear OF_POPULATED flag

Clear OF_POPULATED flag, so that GPC power domain driver[1] can be
bound to "gpc" node as well.

[1] https://lkml.org/lkml/2017/3/28/835

Cc: yurovsky@gmail.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

drivers/irqchip/irq-imx-gpcv2.c

@@ -266,6 +266,11 @@ static int __init imx_gpcv2_irqchip_init(struct device_node *node,
 	imx_gpcv2_instance = cd;
 	register_syscore_ops(&imx_gpcv2_syscore_ops);
 
+	/*
+	 * Clear the OF_POPULATED flag set in of_irq_init so that
+	 * later the GPC power domain driver will not be skipped.
+	 */
+	of_node_clear_flag(node, OF_POPULATED);
 	return 0;
 }