arrangements for 64-bit UnixAos

git-svn-id: https://www.ocp.inf.ethz.ch/svn/aos/trunk@5622 8c9fc860-2736-0410-a75d-ab315db34111
exported all MII register content constants in NetworkMii module;
added an alpha version of the driver for RTL 8136 family of PCI-E Fast Ethernet controllers; the driver was partially tested on a RTL8105E device

git-svn-id: https://www.ocp.inf.ethz.ch/svn/aos/trunk@5623 8c9fc860-2736-0410-a75d-ab315db34111
inprovements done by F. Necati

git-svn-id: https://www.ocp.inf.ethz.ch/svn/aos/trunk@5624 8c9fc860-2736-0410-a75d-ab315db34111