arm64: dts: ti: k3-j7200-som: Describe OSPI flash partition info

Describe OSPI flash partition information in device tree
so as to remove passing partition information in `mtdparts`
commandline parameter.

Signed-off-by: Vaishnav Achath <vaishnav.a@ti.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>

Author: vaishnavachath

arch/arm64/boot/dts/ti/k3-j7200-som-p0.dtsi

@@ -271,7 +271,7 @@
 	pinctrl-names = "default";
 	pinctrl-0 = <&mcu_fss0_ospi0_pins_default>;
 
-	flash@0{
+	flash@0 {
 		compatible = "jedec,spi-nor";
 		reg = <0x0>;
 		spi-tx-bus-width = <8>;
@@ -284,5 +284,46 @@
 		cdns,read-delay = <4>;
 		#address-cells = <1>;
 		#size-cells = <1>;
+
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
+			partition@0 {
+				label = "ospi.tiboot3";
+				reg = <0x0 0x100000>;
+			};
+
+			partition@100000 {
+				label = "ospi.tispl";
+				reg = <0x100000 0x200000>;
+			};
+
+			partition@300000 {
+				label = "ospi.u-boot";
+				reg = <0x300000 0x400000>;
+			};
+
+			partition@700000 {
+				label = "ospi.env";
+				reg = <0x700000 0x40000>;
+			};
+
+			partition@740000 {
+				label = "ospi.env.backup";
+				reg = <0x740000 0x40000>;
+			};
+
+			partition@800000 {
+				label = "ospi.rootfs";
+				reg = <0x800000 0x37c0000>;
+			};
+
+			partition@3fc0000 {
+				label = "ospi.phypattern";
+				reg = <0x3fc0000 0x40000>;
+			};
+		};
 	};
 };