e1000: make ioport free

e1000: make ioport free

This patch makes e1000 driver ioport-free.
This corrects behavior in probe function so as not to request ioport
resources as long as they are not really needed.  This is based on the
ioport-free patch of e1000 driver from Auke Kok and Tomohiro Kusumi.

Signed-off-by: Tomohiro Kusumi <[email protected]>
Signed-off-by: Auke Kok <[email protected]>
Signed-off-by: Taku Izumi <[email protected]>
Signed-off-by: Jeff Kirsher<[email protected]>
Signed-off-by: Jeff Garzik <[email protected]>