platforms/zz: Re-enable LXVPD slot information parsing
platforms/zz: Re-enable LXVPD slot information parsing

>From memory this was disabled in the distant past since we were waiting
for an updates to the LXPVD format. It looks like that never happened
so re-enable it for the ZZ platform so that we can get PCI slot location
codes on ZZ.

Cc: Vasant Hegde <a6d753843573f7bfed5075c1e875b0be8007a0ab@linux.vnet.ibm.com>
Signed-off-by: Oliver O'Halloran <3dfaff8fa6ae977f042064a112a6aac576279b9b@gmail.com>
Signed-off-by: Stewart Smith <ec31ab75ddf977353c8f660f92ea8b23f64aef25@linux.ibm.com>

stewart-ibm/skiboot,qemu/skiboot,legoater/skiboot,open-power/skiboot,shenki/skiboot,legoater/skiboot,shenki/skiboot,qemu/skiboot,stewart-ibm/skiboot,shenki/skiboot,shenki/skiboot,open-power/skiboot,legoater/skiboot,qemu/skiboot,open-power/skiboot,stewart-ibm/skiboot,legoater/skiboot,qemu/skiboot,shenki/skiboot,open-power/skiboot,open-power/skiboot,qemu/skiboot,legoater/skiboot