pinctrl: cherryview: Use GPIO chip pointer in chv_gpio_irq_mask_unmask()

The callers already have dereferenced pointer to GPIO chip, no need to
do it again in chv_gpio_irq_mask_unmask(). Hence, replace IRQ data pointer
by GPIO chip pointer.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>