[PATCH] Add rapidio net driver

Adds an "Ethernet" driver which sends Ethernet packets over the standard
RapidIO messaging.  This depends on the core RIO patch for mailbox/doorbell
access.

Signed-off-by: Matt Porter <mporter@kernel.crashing.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>