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

drivers/ata/sata_uli.c

@@ -83,6 +83,7 @@ static struct ata_port_operations uli_ops = {
 	.inherits		= &ata_bmdma_port_ops,
 	.scr_read		= uli_scr_read,
 	.scr_write		= uli_scr_write,
+	.hardreset		= ATA_OP_NULL,
 };
 
 static const struct ata_port_info uli_port_info = {