refactor(gic600ae): update model parameters

Latest GIC600 AE FVP model(11.17/21) no longer support the
base address per redistributor parameter i.e.
gic_iri.reg-base-per-redistributor.
Hence derived the desired base address of GICR by specifying
the appropriate ITScount.

Change-Id: I524e3a0c260293c8223f8fc4332f089bce09ce27
Signed-off-by: Manish V Badarkhe <Manish.Badarkhe@arm.com>
1 file changed