ARM: dts: dra7: Add MPU OPP supply node

Add the OPP supply node for the MPU voltage rail to provide the
information needed by the ti-opp-supply driver to enable AVS Class 0.
Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/dra7.dtsi

@@ -2061,6 +2061,19 @@ rng: rng@48090000 {
 			clocks = <&l3_iclk_div>;
 			clock-names = "fck";
 		};
+
+		opp_supply_mpu: opp-supply@4a003b20 {
+			compatible = "ti,omap5-opp-supply";
+			reg = <0x4a003b20 0xc>;
+			ti,efuse-settings = <
+			/* uV   offset */
+			1060000 0x0
+			1160000 0x4
+			1210000 0x8
+			>;
+			ti,absolute-max-voltage-uv = <1500000>;
+		};
+
 	};
 
 	thermal_zones: thermal-zones {