typhoon: set_settings broken on big-endian

One cpu_to_le16() too many when passing argument for TYPHOON_CMD_XCVR_SELECT;
we end up passing host-endian while the hardware expects little-endian.  The
other place doing that (typhoon_start_runtime()) does the right thing, so the
card will recover at the next ifconfig up/tx timeout/resume, which limits the
amount of mess, but still, WTF?

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Jeff Garzik <jeff@garzik.org>