Ethernet phy update - 8: phy port cleanup

#Removed redundant #logical-interface to #phy #port #mapping from ethernet module. Started phase-2 restructuring of ethernet phy port framework. #Enabled #standard #phy #port #indexing once again.

#Ethernet update 114 ...
[commit 10e4f6e3261bc807daa081ca5c4e78f0ac5301d2]