ARM: dts: qcom: msm8974: add missing TCSR syscon compatible

TCSR syscon node should come with dedicated compatible.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Tested-by: Luca Weiss <luca@z3ntu.xyz> # fairphone-fp2
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220920150414.637634-3-krzysztof.kozlowski@linaro.org

arch/arm/boot/dts/qcom-msm8974.dtsi

@@ -1239,7 +1239,7 @@ tcsr_mutex_block: syscon@fd484000 {
 		};
 
 		tcsr: syscon@fd4a0000 {
-			compatible = "syscon";
+			compatible = "qcom,tcsr-msm8974", "syscon";
 			reg = <0xfd4a0000 0x10000>;
 		};