irqchip/qcom: Use builtin_platform_driver to simplify the code

Use the builtin_platform_driver() macro to make the code simpler.

Signed-off-by: Wei Yongjun <[e-mail]>
Signed-off-by: Marc Zyngier <[e-mail]>

drivers/irqchip/qcom-irq-combiner.c

···
 	},
 	.probe = combiner_probe,
 };
-
-static int __init register_qcom_irq_combiner(void)
-{
-	return platform_driver_register(&qcom_irq_combiner_probe);
-}
-device_initcall(register_qcom_irq_combiner);
+builtin_platform_driver(qcom_irq_combiner_probe);