forked from Imagelibrary/rtems
* include/confdefs.h, include/rtems/config.h, include/rtems/io.h, optman/no-io.c, src/exinit.c, src/io.c: Added a device driver register/unregister interface to allow device drivers to be installed and removed at runtime. This means you do not need devices present in the device table when you build.