dts: Add SMPGROUP targets to p10 dts
dts: Add SMPGROUP targets to p10 dts

Signed-off-by: lkammath <e2a6a91c0fecfe4bb63daf1b5646cb793f8b9eea@in.ibm.com>
Reviewed-by: Amitay Isaacs <a505e7c038746dbeb3edcd8d146dbd515432801f@ozlabs.org>

open-power/pdbg,open-power/pdbg,open-power/pdbg