PBB provider instance port update - 4

Added provider instance port ( #PIP ) detach routines in bridge module. This will detach the PIP #port from the #I-Component in a #BEB device. This will be used when PIP port is getting #deactivate d or getting #reallocate d between different I-Components.

#802-1AH update 22 ...
[commit 299e62c64c02bf27967173d86a2eec2d491fa9ab]