arm64: dts: qcom: msm8996: add missing TCSR syscon compatible

TCSR syscon node should come with dedicated compatible.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220909092035.223915-9-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/msm8996.dtsi

@@ -3500,7 +3500,7 @@ frame@98c0000 {
 		};
 
 		saw3: syscon@9a10000 {
-			compatible = "syscon";
+			compatible = "qcom,tcsr-msm8996", "syscon";
 			reg = <0x09a10000 0x1000>;
 		};