arm64: dts: qcom: ipq6018: 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/20220909092035.223915-6-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/ipq6018.dtsi

@@ -258,7 +258,7 @@ tcsr_mutex_regs: syscon@1905000 {
 		};
 
 		tcsr: syscon@1937000 {
-			compatible = "syscon";
+			compatible = "qcom,tcsr-ipq6018", "syscon";
 			reg = <0x0 0x01937000 0x0 0x21000>;
 		};