otPlatDiagGpioSetMode() function

OT_ERROR_NONE Successfully set the gpio mode. OT_ERROR_FAILED A platform error occurred while setting the gpio mode. OT_ERROR_INVALID_ARGS @p aGpio or @p aMode is not supported. OT_ERROR_INVALID_STATE Diagnostic mode was not enabled. OT_ERROR_NOT_IMPLEMENTED This function is not implemented or configured on the platform.