Migrate the PCIe-IDIO-24 and WS16C48 GPIO drivers

Merge series from William Breathitt Gray <william.gray@linaro.org>:

The regmap API supports IO port accessors so we can take advantage of
regmap abstractions rather than handling access to the device registers
directly in the driver.

A patch to pass irq_drv_data as a parameter for struct regmap_irq_chip
set_type_config() is included. This is needed by the
idio_24_set_type_config() and ws16c48_set_type_config() callbacks in
order to update the type configuration on their respective devices.

diff --cc drivers/base/regmap/regmap-irq.c
Simple merge

diff --cc include/linux/regmap.h
Simple merge