[TG3]: Assign tp->link_config.orig_* values.

tp->link_config.orig_* values must be assigned during
tg3_set_settings() because these values will be used to setup the
link speed during tg3_open().  Without these assignments, the link
speed settings will be all messed by if tg3_set_settings() is called
when the device is down.

Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>