drivers: gpio_ht16k33: add hard-coded support for pin validation

Add the common config structure as a prefix of the driver-specific
config structure.  The devicetree binding does not inherit from
gpio-controller, so the required property is not available there.  A
hard-coded value of 32 pins has been implemented to make the driver
function.

Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
1 file changed