atl1: drop NET_PCI from Kconfig

The atl1 driver doesn't need NET_PCI.  Remove it from Kconfig.
Noticed by Chad Sprouse.

Signed-off-by: Jay Cliburn <jacliburn@bellsouth.net>
Signed-off-by: Chris Snook <csnook@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>