API: Remove support for `GPIO_INT_*` flags in `gpio_pin_configure()` function

Piotr Mienkowski

Hi all,

This is to let you know that we are going to remove support for passing `GPIO_INT_*` flags to `gpio_pin_configure()` function. The feature has been deprecated in the Zephyr 2.2 release. The interrupt flags will be accepted by `gpio_pin_interrupt_configure()` function only.