PCI: iproc: Use of_property_read_bool() for boolean properties

Replace low-level property access functions like of_get_property() and
of_find_property() with their typed equivalents (i.e., of_property_read_<type>
functions), as it's preferred to use typed property access functions for
reading properties.

[kwilczynski: commit log]
Link: https://lore.kernel.org/linux-pci/20230609193326.1963542-1-robh@kernel.org


Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>
Reviewed-by: Florian Fainelli <florian.fainelli@broadcom.com>
Acked-by: Ray Jui <ray.jui@broadcom.com>