arm64: dts: qcom: sdm845: Add unit name to soc node

We get a warning about missing unit name for soc node, so add it.

arch/arm64/boot/dts/qcom/sdm845.dtsi:623.11-2814.4: Warning (unit_address_vs_reg): /soc: node has a reg or ranges property, but no unit name

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Reviewed-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>