arm: mvebu: remove 'clock-frequency' properties from Armada 370/XP Ethernet nodes

The mvneta driver for the Marvell Armada 370/XP Ethernet devices has
gained proper clock framework integration, and the corresponding
Device Tree nodes now have a correct 'clocks' pointer.

The 'clock-frequency' properties in the various .dts files for Armada
370/XP boards have therefore become useless.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

arch/arm/boot/dts/armada-370-db.dts

@@ -50,13 +50,11 @@ phy1: ethernet-phy@1 {
 		};
 
 		ethernet@d0070000 {
-			clock-frequency = <200000000>;
 			status = "okay";
 			phy = <&phy0>;
 			phy-mode = "rgmii-id";
 		};
 		ethernet@d0074000 {
-			clock-frequency = <200000000>;
 			status = "okay";
 			phy = <&phy1>;
 			phy-mode = "rgmii-id";

arch/arm/boot/dts/armada-370-mirabox.dts

@@ -43,13 +43,11 @@ phy1: ethernet-phy@1 {
 			};
 		};
 		ethernet@d0070000 {
-			clock-frequency = <200000000>;
 			status = "okay";
 			phy = <&phy0>;
 			phy-mode = "rgmii-id";
 		};
 		ethernet@d0074000 {
-			clock-frequency = <200000000>;
 			status = "okay";
 			phy = <&phy1>;
 			phy-mode = "rgmii-id";

arch/arm/boot/dts/armada-xp-db.dts

@@ -70,25 +70,21 @@ phy3: ethernet-phy@3 {
 		};
 
 		ethernet@d0070000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy0>;
 			phy-mode = "rgmii-id";
 		};
 		ethernet@d0074000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy1>;
 			phy-mode = "rgmii-id";
 		};
 		ethernet@d0030000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy2>;
 			phy-mode = "sgmii";
 		};
 		ethernet@d0034000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy3>;
 			phy-mode = "sgmii";

arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts

@@ -85,25 +85,21 @@ phy3: ethernet-phy@3 {
 		};
 
 		ethernet@d0070000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy0>;
 			phy-mode = "sgmii";
 		};
 		ethernet@d0074000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy1>;
 			phy-mode = "sgmii";
 		};
 		ethernet@d0030000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy2>;
 			phy-mode = "sgmii";
 		};
 		ethernet@d0034000 {
-			clock-frequency = <250000000>;
 			status = "okay";
 			phy = <&phy3>;
 			phy-mode = "sgmii";