[Bridge] [RFC 1/2] macvlan: Allow plugging in additional backends

[Patrick McHardy]

Arnd Bergmann wrote:
> This patch includes only the basic framework for overriding the
> receive path. With these hooks, we can add the macvtap driver
> and potentially other drivers that directly interface with a
> hypervisor.
> 
> Loosely based on a patch by Patrick Mullaney based on another
> patch by Arnd Bergmann.

This patch looks fine to me.