[PATCH] via-rhine: add option avoid_D3 (work around broken BIOSes)

It looks like broken BIOSes controlling Rhine chips will remain in use in
significant numbers; such systems fail to come up via PXE after they have
been put into D3 (power-saving) mode.

This patch adds a module option for disabling the call that puts the chip
to sleep.

Signed-off-by: Roger Luethi <rl@hellgate.ch>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Joerg Bashir <brak@archive.org>
Cc: Tim Phipps <tim@phipps-hutton.freeserve.co.uk>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Jeff Garzik <jeff@garzik.org>