armv8: Add framework for CCN-504 interconnect configuration

This patch adds a minimal framework for Dickens CCN-504
interconnect configuration - mainly related to adding Clusters/cores
to snoop/DVM domain and setting QoS of the RN-I ports.

LS2085A platform makes use of these configurations to support
better network data performance and to boot a SMP Linux.

Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>