ARM: dts: exynos: correct TMU phandle in Exynos4210

TMU node uses 0 as thermal-sensor-cells, thus thermal zone referencing
it must not have an argument to phandle.  Since thermal-sensors property is
already defined in included exynos4-cpu-thermal.dtsi, drop it from
exynos4210.dtsi to fix the error and remoev redundancy.

Fixes: 9843a223 ("ARM: dts: Provide dt bindings identical for Exynos TMU")
Cc: <stable@vger.kernel.org>
Link: https://lore.kernel.org/r/20230209105841.779596-2-krzysztof.kozlowski@linaro.orgSigned-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>

arch/arm/boot/dts/exynos4210.dtsi

@@ -393,7 +393,6 @@ &cpu_alert2 {
 &cpu_thermal {
 	polling-delay-passive = <0>;
 	polling-delay = <0>;
-	thermal-sensors = <&tmu 0>;
 };
 
 &gic {