mfd: Convert HTC I2C CPLD driver to irq_ API

The genirq core is being converted to pass a struct irq_data to interrupt
operations rather than an IRQ number.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Cory Maccarrone <darkstar6262@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>