arm64: dts: sparx5: rename pinctrl nodes

The pinctrl device tree binding will be converted to YAML format. Rename
the pin nodes so they end with "-pins" to match the schema.

Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20220420194600.3416282-1-michael@walle.cc
Link: https://lore.kernel.org/r/20220319204628.1759635-5-michael@walle.cc


Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>