armv8: fsl-lsch3: Make CCN-504 related code conditional

LS2080 family has CCN-504 cache coherent interconnet. Other SoCs
in LSCH3 family may have differnt interconnect.

Signed-off-by: Ashish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: Prabhakar Kushwaha <prabhakar.kushwaha@nxp.com>
[YS: revised commit message]
Reviewed-by: York Sun <york.sun@nxp.com>