Ethernet phy update - 12: added component level phy port attach / detach routines

Added #phy #port #attach / #detach #routine s for component in ethernet module. This will #handle the #hierarchical #processing associated with phy port attach / detach operations.

#Ethernet update 122 ...
[commit d392286c42c73ee414e523f33cff7ca0fbe9e4b0]