Introducing ROM component which can discard most significant
bits when calling the load function of the loader.
This allows us to replicate some code in several cluster as
we can mask the cluster ID bits of the address.
vci_cc_vcache_wrapper:
Introducing a INST_PADDR_EXT register. This register allows
to access addresses further than 4Gbytes when MMU is
de-activated.
Introducing a way to initialize the INST_PADDR_EXT and DATA_
PADDR_EXT registers during reset.