sata_uli: hardreset is broken

sata_uli can't do hardresets reliably and lock up.  This went
unnoticed till now as softreset was the default and hardreset was only
used after softreset failed.

Reported by Christian Casteyde in bz#10860.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Christian Casteyde <casteyde.christian@free.fr>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>