ramips: move partitions into partition table node

Starting with kernel 4.4, the use of partitions as direct subnodes of the
mtd device is discouraged and only supported for backward compatiblity
reasons.

Signed-off-by: Alex Maclean <monkeh@monkeh.net>

target/linux/ramips/dts/HG255D.dts

@@ -18,36 +18,40 @@
 		reg = <0x1f000000 0x1000000>;
 		bank-width = <2>;
 		device-width = <2>;
-		#address-cells = <1>;
-		#size-cells = <1>;
 
-		partition@0 {
-			label = "u-boot";
-			reg = <0x0 0x40000>;
-			read-only;
-		};
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
 
-		partition@30000 {
-			label = "u-boot-env";
-			reg = <0x40000 0x20000>;
-			read-only;
-		};
+			partition@0 {
+				label = "u-boot";
+				reg = <0x0 0x40000>;
+				read-only;
+			};
 
-		factory: partition@60000 {
-			label = "factory";
-			reg = <0x60000 0x20000>;
-			read-only;
-		};
+			partition@30000 {
+				label = "u-boot-env";
+				reg = <0x40000 0x20000>;
+				read-only;
+			};
 
-		partition@80000 {
-			label = "firmware";
-			reg = <0x80000 0xf60000>;
-		};
+			factory: partition@60000 {
+				label = "factory";
+				reg = <0x60000 0x20000>;
+				read-only;
+			};
 
-		partition@fa0000 {
-			label = "factory-orig";
-			reg = <0xfa0000 0x20000>;
-			read-only;
+			partition@80000 {
+				label = "firmware";
+				reg = <0x80000 0xf60000>;
+			};
+
+			partition@fa0000 {
+				label = "factory-orig";
+				reg = <0xfa0000 0x20000>;
+				read-only;
+			};
 		};
 	};