MFC if_bridge r1.30
MFC if_bridge r1.30

> If we have been called from ether_ifdetach() then do not try and clear the
> promisc flag from the member interface, this is a no-op anyway since the
> interface is disappearing. The driver may have already released
> its resources such as miibus and this is likely to panic the kernel.

Approved by:	re (scottl)

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