Revert "posix: device_io: use mode argument correctly in open()" This reverts commit 499a6339764b51f2ebde2081c33fc1936be9b8dd. PR #73978 introduced a regression. Unfortunately this PR cannot be reverted without reverting also Let's revert both PRs to stabilize main again towards the 3.7 release. For more details on the issue see https://github.com/zephyrproject-rtos/zephyr/issues/75205 Signed-off-by: Alberto Escolar Piedras <alberto.escolar.piedras@nordicsemi.no>