PBB provider instance port update - 2

Added provider instance port ( #PIP ) attach routines in bridge module. This will attach the PIP #port on to an ethernet #component (same as the #VIP port #I-Component). This routine will find the PIP port #phy and create a new virtual port on the I-Component.

#802-1AH update 20 ...
[commit 446a6bd8d08405e4b22dce9fd3b7f0cf702ea88c]