ARM: dts: qcom: ipq8064: drop invalid GCC thermal-sensor unit-address

GCC comes with syscon compatible so the thermal-sensor child node should
not have unit-address (bindings also do not expect it):

  Warning (unit_address_vs_reg): /soc/clock-controller@900000/thermal-sensor@900000: node has a unit name, but no reg or ranges property

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/20230420075053.41976-5-krzysztof.kozlowski@linaro.org