[i.MX8QM] add SECO+NXP fixes for instability

NXP declared instability of i.MX8QM, to be fixed with several fixes, some in the kernel and some in SCFW.

- reduce A72 frequency to 1.3GHz             -> kernel
- disable GPU overdrive mode                 -> kernel
- increase VDD_A72 nominal to 1.1375V        -> SCFW
- increase VDD_GPU nominal to 1.03125V       -> SCFW

arch/arm64/boot/dts/seco/include/imx8-ss-gpu1.dtsi

@@ -23,7 +23,7 @@ gpu1_subsys: bus@54100000 {
 		clock-names = "core", "shader";
 		assigned-clocks = <&clk IMX_SC_R_GPU_1_PID0 IMX_SC_PM_CLK_PER>,
 				  <&clk IMX_SC_R_GPU_1_PID0 IMX_SC_PM_CLK_MISC>;
-		assigned-clock-rates = <800000000>, <1000000000>;
+		assigned-clock-rates = <650000000>, <700000000>;
 		fsl,sc_gpu_pid = <IMX_SC_R_GPU_1_PID0>;
 		power-domains = <&pd IMX_SC_R_GPU_1_PID0>;
 		status = "disabled";

arch/arm64/boot/dts/seco/include/imx8qm-ss-gpu.dtsi

@@ -5,7 +5,7 @@
  */
 
 &gpu_3d0 {
-	assigned-clock-rates = <800000000>, <1000000000>;
+	assigned-clock-rates = <650000000>, <700000000>;
 	fsl,sc_gpu_pid = <IMX_SC_R_GPU_0_PID0>;
 };
 
@@ -18,8 +18,6 @@
 		depth-compression = <0>;
 		/*<freq-kHz vol-uV>*/
 		operating-points = <
-			/*overdrive*/  800000  0  /*The first tuple is for core clock frequency*/
-				1000000 0  /*The second tuple is for shader clock frequency*/
 			/*nominal*/    650000  0
 				700000  0
 			/*underdrive*/ 400000  0  /*core/shader clock share the same frequency on underdrive mode*/

arch/arm64/boot/dts/seco/include/imx8qm.dtsi

@@ -215,13 +215,6 @@
 			opp-microvolt = <1100000>;
 			clock-latency-ns = <150000>;
 		};
-
-		opp-1596000000 {
-			opp-hz = /bits/ 64 <1596000000>;
-			opp-microvolt = <1100000>;
-			clock-latency-ns = <150000>;
-			opp-suspend;
-		};
 	};
 
 	gic: interrupt-controller@51a00000 {