Fix SCI transmission sequence in console output function.

This reorders the write sequence to match the SH-3 manual, and corrects
a console corruption bug observed on SH-3 SCI.
Signed-off-by: NToshinobu Sugioka <sugioka@itonet.co.jp>
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>