arm64: dts: marvell: armada-ap810: Fix GICv3 ITS node name

The GICv3 ITS is an MSI controller, therefore its node name should be
'msi-controller'.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230207234735.201812-1-robh@kernel.org


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