Commit 6d98bda7 changed the init order
for chrp_pci_fixup_vt8231_ata().

It can not work anymore because either the irq is not yet set to 14 or
pci_get_device() returns nothing.  At least the printk() in
chrp_pci_fixup_vt8231_ata() does not trigger anymore.
pata_via works again on Pegasos with the change below.
Signed-off-by: NOlaf Hering <olaf@aepfle.de>
Signed-off-by: NPaul Mackerras <paulus@samba.org>