arm64: dts: qcom: sm8550: drop incorrect cells from serial

The serial/UART device node does not have children with unit addresses,
so address/size cells are not correct.

Fixes: 377972ac ("arm64: dts: qcom: sm8550: add I2C Master Hub nodes")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230124084951.38195-4-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/sm8550.dtsi

@@ -1584,8 +1584,6 @@ uart7: serial@a9c000 {
 				interconnect-names = "qup-core", "qup-config";
 				interconnects =	<&clk_virt MASTER_QUP_CORE_1 0 &clk_virt SLAVE_QUP_CORE_1 0>,
 						<&gem_noc MASTER_APPSS_PROC 0 &config_noc SLAVE_QUP_1 0>;
-				#address-cells = <1>;
-				#size-cells = <0>;
 				status = "disabled";
 			};
 		};