net: via-rhine: add OF bus binding

This should make the driver usable with VIA/WonderMedia ARM-based
Systems-on-Chip integrated Rhine III adapters. Note that these
are always in MMIO mode, and don't have any known EEPROM.
Signed-off-by: Alexey Charkov <alchark@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/via-rhine.txt

+* VIA Rhine 10/100 Network Controller
+
+Required properties:
+- compatible : Should be "via,vt8500-rhine" for integrated
+	Rhine controllers found in VIA VT8500, WonderMedia WM8950
+	and similar. These are listed as 1106:3106 rev. 0x84 on the
+	virtual PCI bus under vendor-provided kernels
+- reg : Address and length of the io space
+- interrupts : Should contain the controller interrupt line
+
+Examples:
+
+ethernet@d8004000 {
+	compatible = "via,vt8500-rhine";
+	reg = <0xd8004000 0x100>;
+	interrupts = <10>;
+};

arch/arm/boot/dts/vt8500.dtsi

@@ -165,5 +165,11 @@ rtc@d8100000 {
 			reg = <0xd8100000 0x10000>;
 			interrupts = <48>;
 		};
+
+		ethernet@d8004000 {
+			compatible = "via,vt8500-rhine";
+			reg = <0xd8004000 0x100>;
+			interrupts = <10>;
+		};
 	};
 };

arch/arm/boot/dts/wm8650.dtsi

@@ -218,5 +218,11 @@ rtc@d8100000 {
 			reg = <0xd8100000 0x10000>;
 			interrupts = <48>;
 		};
+
+		ethernet@d8004000 {
+			compatible = "via,vt8500-rhine";
+			reg = <0xd8004000 0x100>;
+			interrupts = <10>;
+		};
 	};
 };

arch/arm/boot/dts/wm8850.dtsi

@@ -298,5 +298,11 @@ sdhc@d800a000 {
 			bus-width = <4>;
 			sdon-inverted;
 		};
+
+		ethernet@d8004000 {
+			compatible = "via,vt8500-rhine";
+			reg = <0xd8004000 0x100>;
+			interrupts = <10>;
+                };
 	};
 };

drivers/net/ethernet/via/Kconfig

@@ -19,7 +19,7 @@ if NET_VENDOR_VIA
 
 config VIA_RHINE
 	tristate "VIA Rhine support"
-	depends on PCI
+	depends on (PCI || USE_OF)
 	select CRC32
 	select MII
 	---help---