[PATCH] sk98lin: not doing high dma properly

Sk98lin 64bit memory handling is wrong. It doesn't set the
highdma flag; i.e. the kernel always does bounce buffers.
It doesn't fallback to 32 bit mask if it can't get 64 bit mask.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>