Add support for the UCD90320 chip and its expanded set of GPIO pins.
Signed-off-by: NJim Wright <wrightj@linux.vnet.ibm.com>
Link: https://lore.kernel.org/r/20191205232411.21492-3-wrightj@linux.vnet.ibm.comSigned-off-by: NGuenter Roeck <linux@roeck-us.net>