ath79: use the new DT fixed partitions syntax

This new syntax is slightly better designed & uses "compatible" string.
For details see Documentation/devicetree/bindings/mtd/partition.txt .

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

target/linux/ath79/dts/ar7161_netgear_wndr3800.dts

@@ -139,6 +139,11 @@
 		reg = <0>;
 		spi-max-frequency = <25000000>;
 
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
 			partition@0 {
 				label = "u-boot";
 				reg = <0x000000 0x050000>;
@@ -161,6 +166,7 @@
 				read-only;
 			};
 		};
+	};
 };
 
 &eth0 {

target/linux/ath79/dts/ar7241_ubnt-unifi.dts

@@ -68,6 +68,11 @@
 		reg = <0>;
 		spi-max-frequency = <25000000>;
 
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
 			partition@0 {
 				label = "u-boot";
 				reg = <0x000000 0x040000>;
@@ -101,6 +106,7 @@
 				read-only;
 			};
 		};
+	};
 };
 
 &pcie {

target/linux/ath79/dts/ar7241_ubnt-xm.dtsi

@@ -77,6 +77,11 @@
 		reg = <0>;
 		spi-max-frequency = <25000000>;
 
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
 			partition@0 {
 				label = "u-boot";
 				reg = <0x000000 0x040000>;
@@ -110,6 +115,7 @@
 				read-only;
 			};
 		};
+	};
 };
 
 &pcie {

target/linux/ath79/dts/ar9132_tl_wr1043nd_v1.dts

@@ -94,6 +94,11 @@
 		reg = <0>;
 		spi-max-frequency = <25000000>;
 
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
 			partition@0 {
 				label = "u-boot";
 				reg = <0x000000 0x020000>;
@@ -110,4 +115,5 @@
 				read-only;
 			};
 		};
+	};
 };

target/linux/ath79/dts/ar9330_gl_ar150.dts

@@ -96,6 +96,11 @@
 		spi-max-frequency = <104000000>;
 		reg = <0>;
 
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
 			partition@0 {
 				label = "u-boot";
 				reg = <0x000000 0x040000>;
@@ -118,6 +123,7 @@
 				read-only;
 			};
 		};
+	};
 };
 
 &mdio0 {

target/linux/ath79/dts/ar9331_ew_dorin.dts

@@ -77,6 +77,11 @@
 		spi-max-frequency = <104000000>;
 		reg = <0>;
 
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
 			partition@0 {
 				label = "u-boot";
 				reg = <0x000000 0x040000>;
@@ -99,6 +104,7 @@
 				read-only;
 			};
 		};
+	};
 };
 
 &eth1 {

target/linux/ath79/dts/qca9558_om5p_ac.dts

@@ -113,6 +113,11 @@
 		reg = <0>;
 		spi-max-frequency = <25000000>;
 
+		partitions {
+			compatible = "fixed-partitions";
+			#address-cells = <1>;
+			#size-cells = <1>;
+
 			partition@0 {
 				label = "u-boot";
 				reg = <0x000000 0x040000>;
@@ -135,6 +140,7 @@
 				read-only;
 			};
 		};
+	};
 };
 
 &mdio0 {