ethernet: Add new driver for Marvell Armada 375 network unit

* Marvell Armada 375 Ethernet Controller (PPv2)

Required properties:

- compatible: should be "marvell,armada-375-pp2"

- reg: addresses and length of the register sets for the device.

  Must contain the following register sets:

	- common controller registers

	- LMS registers

  In addition, at least one port register set is required.

- clocks: a pointer to the reference clocks for this device, consequently:

	- main controller clock

	- GOP clock

- clock-names: names of used clocks, must be "pp_clk" and "gop_clk".

The ethernet ports are represented by subnodes. At least one port is

required.

Required properties (port):

- interrupts: interrupt for the port

- port-id: should be '0' or '1' for ethernet ports, and '2' for the

           loopback port

- phy-mode: See ethernet.txt file in the same directory

Optional properties (port):

- marvell,loopback: port is loopback mode

- phy: a phandle to a phy node defining the PHY address (as the reg

  property, a single integer). Note: if this property isn't present,

  then fixed link is assumed, and the 'fixed-link' property is

  mandatory.

Example:

ethernet@f0000 {

	compatible = "marvell,armada-375-pp2";

	reg = <0xf0000 0xa000>,

	      <0xc0000 0x3060>,

	      <0xc4000 0x100>,

	      <0xc5000 0x100>;

	clocks = <&gateclk 3>, <&gateclk 19>;

	clock-names = "pp_clk", "gop_clk";

	status = "okay";

	eth0: eth0@c4000 {

		interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;

		port-id = <0>;

		status = "okay";

		phy = <&phy0>;

		phy-mode = "gmii";

	};

	eth1: eth1@c5000 {

		interrupts = <GIC_SPI 41 IRQ_TYPE_LEVEL_HIGH>;

		port-id = <1>;

		status = "okay";

		phy = <&phy3>;

		phy-mode = "gmii";

	};

};

	  driver, which should be used for the older Marvell SoCs

	  (Dove, Orion, Discovery, Kirkwood).

config MVPP2

	tristate "Marvell Armada 375 network interface support"

	depends on MACH_ARMADA_375

	select MVMDIO

	---help---

	  This driver supports the network interface units in the

	  Marvell ARMADA 375 SoC.

config PXA168_ETH

	tristate "Marvell pxa168 ethernet support"

	depends on CPU_PXA168

obj-$(CONFIG_MVMDIO) += mvmdio.o

obj-$(CONFIG_MV643XX_ETH) += mv643xx_eth.o

obj-$(CONFIG_MVNETA) += mvneta.o

obj-$(CONFIG_MVPP2) += mvpp2.o

obj-$(CONFIG_PXA168_ETH) += pxa168_eth.o

obj-$(CONFIG_SKGE) += skge.o

obj-$(CONFIG_SKY2) += sky2.o