dt/bindings: remove users of device_type "mdio"

device_type is a deprecated property, but some MDIO bus nodes still have
it. Except for a couple of old binding (compatible="gianfar" and
compatible="ucc_geth_phy") the kernel doesn't look for
device_type="mdio" at all.

This patch removes all instances of device_type="mdio" from the binding
documentation and the .dts files.

Signed-off-by: Grant Likely <grant.likely@linaro.org>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Ian Campbell <ijc+devicetree@hellion.org.uk>
Cc: Kumar Gala <galak@codeaurora.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>

Documentation/devicetree/bindings/marvell.txt

@@ -79,7 +79,6 @@ prefixed with the string "marvell,", for Marvell Technology Group Ltd.
    Required properties:
      - #address-cells : Should be <1>
      - #size-cells : Should be <0>
-     - device_type : Should be "mdio"
      - compatible : Should be "marvell,mv64360-mdio"
 
    Example:
@@ -87,7 +86,6 @@ prefixed with the string "marvell,", for Marvell Technology Group Ltd.
      mdio {
 	     #address-cells = <1>;
 	     #size-cells = <0>;
-	     device_type = "mdio";
 	     compatible = "marvell,mv64360-mdio";
 
 	     ethernet-phy@0 {

Documentation/devicetree/bindings/powerpc/fsl/cpm_qe/network.txt

@@ -33,7 +33,6 @@ fsl,mdc-pin : pin of port C controlling mdio clock
 
 Example:
 	mdio@10d40 {
-		device_type = "mdio";
 		compatible = "fsl,mpc8272ads-mdio-bitbang",
 			     "fsl,mpc8272-mdio-bitbang",
 			     "fsl,cpm2-mdio-bitbang";

arch/powerpc/boot/dts/ep8248e.dts

@@ -67,7 +67,6 @@
 			ranges;
 
 			mdio {
-				device_type = "mdio";
 				compatible = "fsl,ep8248e-mdio-bitbang";
 				#address-cells = <1>;
 				#size-cells = <0>;

arch/powerpc/boot/dts/holly.dts

@@ -58,7 +58,6 @@
 		};
 
 		MDIO: mdio@6000 {
-			device_type = "mdio";
 			compatible = "tsi109-mdio", "tsi108-mdio";
 			reg = <0x00006000 0x00000050>;
 			#address-cells = <1>;

arch/powerpc/boot/dts/mpc7448hpc2.dts

@@ -68,7 +68,6 @@
 		};
 
 		MDIO: mdio@6000 {
-			device_type = "mdio";
 			compatible = "tsi108-mdio";
 			reg = <0x6000 0x50>;
 			#address-cells = <1>;

arch/powerpc/boot/dts/mpc8272ads.dts

@@ -182,7 +182,6 @@
 			};
 
 			mdio@10d40 {
-				device_type = "mdio";
 				compatible = "fsl,mpc8272ads-mdio-bitbang",
 				             "fsl,mpc8272-mdio-bitbang",
 				             "fsl,cpm2-mdio-bitbang";

arch/powerpc/boot/dts/pq2fads.dts

@@ -198,7 +198,6 @@
 			};
 
 			mdio@10d40 {
-				device_type = "mdio";
 				compatible = "fsl,pq2fads-mdio-bitbang",
 				             "fsl,mpc8280-mdio-bitbang",
 				             "fsl,cpm2-mdio-bitbang";

arch/powerpc/boot/dts/prpmc2800.dts

@@ -73,7 +73,6 @@
 		mdio {
 			#address-cells = <1>;
 			#size-cells = <0>;
-			device_type = "mdio";
 			compatible = "marvell,mv64360-mdio";
 			PHY0: ethernet-phy@1 {
 				compatible = "broadcom,bcm5421";