To be used by the OpenPower BMC machines.

This provides proper chip IDs but also adds the various sub-devices
necessary for the future OCC driver among other. All the added nodes
comply with the existing upstream FSI bindings.
Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: NAndrew Jeffery <andrew@aj.id.au>
Acked-by: NJeremy Kerr <jk@ozlabs.org>
Signed-off-by: NJoel Stanley <joel@jms.id.au>