hdata: Add new "smp-cable-connector" VPD keyword
hdata: Add new "smp-cable-connector" VPD keyword

Recent FSP versions are defining a new VPD keyword
'SN' that brings SMP Cable Connector FRU info.

Signed-off-by: Klaus Heinrich Kiwi <d568b8cd7ef64877891488bb3328757d2d21c847@linux.vnet.ibm.com>
Reviewed-by: Vasant Hegde <a6d753843573f7bfed5075c1e875b0be8007a0ab@linux.vnet.ibm.com>
Signed-off-by: Oliver O'Halloran <3dfaff8fa6ae977f042064a112a6aac576279b9b@gmail.com>

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