arm64: dts: qcom: ipq8074: add compatible fallback to mailbox

IPQ8074 mailbox is compatible with IPQ6018.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230322174148.810938-4-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/ipq8074.dtsi

@@ -686,7 +686,8 @@ watchdog: watchdog@b017000 {
 		};
 
 		apcs_glb: mailbox@b111000 {
-			compatible = "qcom,ipq8074-apcs-apps-global";
+			compatible = "qcom,ipq8074-apcs-apps-global",
+				     "qcom,ipq6018-apcs-apps-global";
 			reg = <0x0b111000 0x1000>;
 			clocks = <&a53pll>, <&xo>;
 			clock-names = "pll", "xo";