ARM: dts: qcom: apq8064-asus-nexus7: add dedicated IMEM compatible

syscon compatible must be preceded with a specific compatible, to
accurately describe the device.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220607171848.535128-4-krzysztof.kozlowski@linaro.org

arch/arm/boot/dts/qcom-apq8064-asus-nexus7-flo.dts

@@ -342,7 +342,7 @@ mmc@12400000 {
 		};
 
 		sram@2a03f000 {
-			compatible = "syscon", "simple-mfd";
+			compatible = "qcom,apq8064-imem", "syscon", "simple-mfd";
 			reg = <0x2a03f000 0x1000>;
 
 			reboot-mode {