Ethernet phy update - 9: correcting phy port indexing

#Corrected #phy #port #indexing in ethernet module. #Switched #to #standard #phy port #indexing in Agent iterator routines. Also phy port mappers were made to use the correct indexing.

#Ethernet update 115 ...
[commit aa6255a8e80c45a469318ce4a32e9e13cc47278d]