serial: mxc: Move common baud gen into _mxc_serial_setbrg

Move the common baud generation code into _mxc_serial_setbrg
so-that dm and non-dm can call this func.

Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed