[C31] [DTS] dmc: Add supported DDR frequencies

from boot log:
dmc: Get wrong frequency, Request 800000000, Current 856000000
dmc: could not find power_model node
dmc: dev_pm_opp_set_rate: failed to find current OPP for freq 856000000 (-34)
dmc: Get wrong frequency, Request 200000000, Current 856000000

from DDR training log:
ddr_set_rate to 328MHZ
ddr_set_rate to 666MHZ
ddr_set_rate to 416MHZ, ctl_index 0
ddr_set_rate to 856MHZ, ctl_index 1
support 416 856 328 666 MHz, current 856MHz

In dmc_opp_table node disable operating point nodes with unsupported
frequency and add opp nodes for supported 328 416 666 856 MHZ frequencies
In dmc node change the frequencies for different system statuses (scenario).
The values are taken from reference board with similar LPDDR4 memory.
Set auto-freq-en to 0, so disable load frequency scaling function and
enable scenario frequency scaling.

Scenario frequency scaling means: entered the specified scenario,
DDR frequency will change to the corresponding frequency defined by
SYS_STATUS_XXX.
The vop-bw-dmc-freq values ​​are valid when load frequency scaling
enabled (auto-freq-en=1).

arch/arm64/boot/dts/seco/seco-rk3399-c31.dtsi

@@ -180,34 +180,72 @@ &gpu {
 };
 
 &dfi {
-	status = "disabled";
+	status = "okay";
 };
 
 &dmc {
-	status = "disabled";
+	status = "okay";
 	center-supply = <&vdd_center>;
 	upthreshold = <40>;
 	downdifferential = <20>;
 	system-status-freq = <
 		/*system status         freq(KHz)*/
-		SYS_STATUS_NORMAL       800000
-		SYS_STATUS_REBOOT       528000
-		SYS_STATUS_SUSPEND      200000
-		SYS_STATUS_VIDEO_1080P  200000
-		SYS_STATUS_VIDEO_4K     600000
-		SYS_STATUS_VIDEO_4K_10B 800000
-		SYS_STATUS_PERFORMANCE  800000
-		SYS_STATUS_BOOST        400000
-		SYS_STATUS_DUALVIEW     600000
-		SYS_STATUS_ISP          600000
+		SYS_STATUS_NORMAL       856000
+		SYS_STATUS_REBOOT       856000
+		SYS_STATUS_SUSPEND      328000
+		SYS_STATUS_VIDEO_1080P  666000
+		SYS_STATUS_VIDEO_4K     856000
+		SYS_STATUS_VIDEO_4K_10B 856000
+		SYS_STATUS_PERFORMANCE  856000
+		SYS_STATUS_BOOST        856000
+		SYS_STATUS_DUALVIEW     856000
+		SYS_STATUS_ISP          856000
 	>;
 	vop-bw-dmc-freq = <
 	/* min_bw(MB/s) max_bw(MB/s) freq(KHz) */
-		0       577      200000
-		578     1701     300000
-		1702    99999    400000
+		0       762      416000
+		763     3012     666000
+		3013    99999    856000
 	>;
-	auto-min-freq = <200000>;
+	auto-min-freq = <328000>;
+	auto-freq-en = <0>;
+};
+
+&dmc_opp_table {
+	opp-200000000 {
+		status = "disabled";
+	};
+	opp-300000000 {
+		status = "disabled";
+	};
+	opp-328000000 {
+		opp-hz = /bits/ 64 <328000000>;
+		opp-microvolt = <900000>;
+	};
+	opp-400000000 {
+		status = "disabled";
+	};
+	opp-416000000 {
+		opp-hz = /bits/ 64 <416000000>;
+		opp-microvolt = <900000>;
+	};
+	opp-528000000 {
+		status = "disabled";
+	};
+	opp-600000000 {
+		status = "disabled";
+	};
+	opp-666000000 {
+		opp-hz = /bits/ 64 <666000000>;
+		opp-microvolt = <900000>;
+	};
+	opp-800000000 {
+		status = "disabled";
+	};
+	opp-856000000 {
+		opp-hz = /bits/ 64 <856000000>;
+		opp-microvolt = <900000>;
+	};
 };
 
 &tsadc {