serial: sh-sci: Add support for loopback mode.

This plugs in loopback control for SCFCR-enabled ports and plugs it in
via the TIOCM_LOOP control, as others do.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2011-11-24 20:20:53 +09:00
commit dc7e3ef7da