Changeset aea3134e in rtems for bsps

leon,apbuart: replace termios c_cflag & CBAUD with c_{i,o}speed

ince some time RTEMS started to use the termios c_ispeed and
c_ospeed variables in the termios struct to hold the UART baudrate.
However the APBUART driver still uses the old c_cflag sometimes
causing other UART parameters to get overwritten, for example the
partiy setting no mapped to the same bits as the old CBAUD mask.

At the same time the RTEMS primitievs for setting/reading
c_{i,o}speed is now used.