nRF boards now require usage of pinctrl, migrate them. Signed-off-by: Gerard Marull-Paretas <gerard.marull@nordicsemi.no>
This is a follow-up to commit 954dfa755b. Apply adjustments made in the i2s_api test to the i2s_speed one so that it can also be executed successfully on the nRF DK boards. Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
954dfa755b