misc: rp1: drop overlay support

misc: rp1: drop overlay support

The RP1 driver can load an overlay at runtime to describe the inner
peripherals. This has led to a lot of confusion regarding the naming
of nodes, their topology and the reclaiming of related node resources.

Since the overlay is currently not fully functional, drop its support
in the driver in favor of the fully described static DT.

This also means that this driver does not depend on CONFIG_PCI_DYNAMIC_OF_NODES
and no longer requires PCI quirks to dynamically create the intermediate
PCI nodes.

Signed-off-by: Andrea della Porta <andrea.porta@suse.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/4b0aa7160877cf128b9bc713776bcac73c46eb24.1766077285.git.andrea.porta@suse.com
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>