[nrf fromtree] drivers: gpio_nrfx: Free channel when changing mode#2991

rlubos merged 1 commit intonrfconnect:mainnrfconnect/sdk-zephyr:mainfrom

MarkusLassila:fix-gpio-nrfx-edge-to-level-change-fromtreeMarkusLassila/sdk-zephyr:fix-gpio-nrfx-edge-to-level-change-fromtreeCopy head branch name to clipboard