ARM: dts: socfpga: drop 0x from unit address

By coding style, unit address should not start with 0x.

Link: https://lore.kernel.org/r/20221210113349.63971-1-krzysztof.kozlowski@linaro.org


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