* libfs/src/devfs/devclose.c, libfs/src/devfs/devopen.c,
libfs/src/imfs/deviceerrno.c, libfs/src/imfs/deviceio.c,
libfs/src/rfs/rtems-rfs-rtems-dev.c: Changed rtems_deviceio_errno() to
cope with a status code of RTEMS_SUCCESSFUL. Removed dependency on
association framework.