ARM: dts: imx7s: Define operating points table for cpufreq

Processor operating points for imx7s.dtsi should be properly defined to
perform correct imx-cpufreq-dt probe and registration and provide an
access to the temperature sensors using the i.MX thermal driver.
Signed-off-by: NDenys Drozdov <denys.drozdov@toradex.com>
Signed-off-by: NFrancesco Dolcini <francesco.dolcini@toradex.com>
Reviewed-by: NFabio Estevam <festevam@gmail.com>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>

arch/arm/boot/dts/imx7s.dtsi

@@ -76,6 +76,22 @@
 			clock-latency = <61036>; /* two CLK32 periods */
 			clocks = <&clks IMX7D_CLK_ARM>;
 			cpu-idle-states = <&cpu_sleep_wait>;
+			operating-points-v2 = <&cpu0_opp_table>;
+			#cooling-cells = <2>;
+			nvmem-cells = <&fuse_grade>;
+			nvmem-cell-names = "speed_grade";
+		};
+	};
+
+	cpu0_opp_table: opp-table {
+		compatible = "operating-points-v2";
+		opp-shared;
+
+		opp-792000000 {
+			opp-hz = /bits/ 64 <792000000>;
+			opp-microvolt = <1000000>;
+			clock-latency-ns = <150000>;
+			opp-supported-hw = <0xf>, <0xf>;
 		};
 	};