sh: remove ioport cruft and smc91x from se7343

Remove out-of-date se7343 ioport code including some old support
for unknown-ne2000-pcmcia-card, cf-over-pcmcia and a mysterical
smc91x that once must have been on a special daughterboard.

Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>