arm64: dts: qcom: sdx75: add unit address to soc node

arm64: dts: qcom: sdx75: add unit address to soc node

Soc node has ranges, thus it must have an unit address. This fixes W=1
dtc warning:

  sdx75.dtsi:399.11-736.4: Warning (unit_address_vs_reg): /soc: node has a reg or ranges property, but no unit name

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20240325102924.26820-1-krzysztof.kozlowski@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>