arm64: dts: qcom: sc7280: Fix cpufreq-epss compatible

The bindings require a SoC-specific compatible to be used next to
qcom,cpufreq-epss. Add it to make dtbs_check happy.
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221016090035.565350-2-luca@z3ntu.xyz

arch/arm64/boot/dts/qcom/sc7280.dtsi

@@ -5355,7 +5355,7 @@ epss_l3: interconnect@18590000 {
 		};
 
 		cpufreq_hw: cpufreq@18591000 {
-			compatible = "qcom,cpufreq-epss";
+			compatible = "qcom,sc7280-cpufreq-epss", "qcom,cpufreq-epss";
 			reg = <0 0x18591000 0 0x1000>,
 			      <0 0x18592000 0 0x1000>,
 			      <0 0x18593000 0 0x1000>;