dmfe for x86 and unbundled PCI nics on SPARC

I've got a dmfe driver working on both SPARC and x86, and it supports some unbundled PCI NICs. (The original driver only worked with onboard dm9102s on certain SPARC hardware.) The Davicom 9102 part is not terribly common, but some low end NICs sold by companies like C/Net and Buffalo use it.

Hopefully this will be putback into snv75.

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