gpio: Fold irq_set_chip/irq_set_handler to irq_set_chip_and_handler

Converted with coccinelle.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
LKML-Reference: <20110324212509.118888535@linutronix.de>