Add clock-frequency property to CPU nodes. Avoids warnings like
[    0.001568] /cpus/cpu@0 missing clock-frequency property
[    0.001588] /cpus/cpu@1 missing clock-frequency property
[    0.001601] /cpus/cpu@2 missing clock-frequency property
[    0.001614] /cpus/cpu@3 missing clock-frequency property
at boot time
Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
                        #cooling-cells = <2>;
                        cooling-min-level = <0>;
                        cooling-max-level = <7>;
+                       clock-frequency = <1300000000>;
                };
                cpu1: cpu@1 {
                        device_type = "cpu";
                        compatible = "arm,cortex-a7";
                        reg = <0x1>;
                        operating-points-v2 = <&cpu_opp_table>;
+                       clock-frequency = <1300000000>;
                };
                cpu2: cpu@2 {
                        device_type = "cpu";
                        compatible = "arm,cortex-a7";
                        reg = <0x2>;
                        operating-points-v2 = <&cpu_opp_table>;
+                       clock-frequency = <1300000000>;
                };
                cpu3: cpu@3 {
                        device_type = "cpu";
                        compatible = "arm,cortex-a7";
                        reg = <0x3>;
                        operating-points-v2 = <&cpu_opp_table>;
+                       clock-frequency = <1300000000>;
                };
        };