dt-bindings: net: drop old mediatek bindings

Remove these old mediatek bindings which are not used.
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/mediatek,mt7620-gsw.txt

-Mediatek Gigabit Switch
-=======================
-
-The mediatek gigabit switch can be found on Mediatek SoCs (mt7620, mt7621).
-
-Required properties:
-- compatible: Should be "mediatek,mt7620-gsw" or "mediatek,mt7621-gsw"
-- reg: Address and length of the register set for the device
-- interrupts: Should contain the gigabit switches interrupt
-- resets: Should contain the gigabit switches resets
-- reset-names: Should contain the reset names "gsw"
-
-Example:
-
-gsw@10110000 {
-	compatible = "ralink,mt7620-gsw";
-	reg = <0x10110000 8000>;
-
-	resets = <&rstctrl 23>;
-	reset-names = "gsw";
-
-	interrupt-parent = <&intc>;
-	interrupts = <17>;
-};

Documentation/devicetree/bindings/net/ralink,rt2880-net.txt

-Ralink Frame Engine Ethernet controller
-=======================================
-
-The Ralink frame engine ethernet controller can be found on Ralink and
-Mediatek SoCs (RT288x, RT3x5x, RT366x, RT388x, rt5350, mt7620, mt7621, mt76x8).
-
-Depending on the SoC, there is a number of ports connected to the CPU port
-directly and/or via a (gigabit-)switch.
-
-* Ethernet controller node
-
-Required properties:
-- compatible: Should be one of "ralink,rt2880-eth", "ralink,rt3050-eth",
-  "ralink,rt3050-eth", "ralink,rt3883-eth", "ralink,rt5350-eth",
-  "mediatek,mt7620-eth", "mediatek,mt7621-eth"
-- reg: Address and length of the register set for the device
-- interrupts: Should contain the frame engines interrupt
-- resets: Should contain the frame engines resets
-- reset-names: Should contain the reset names "fe". If a switch is present
-  "esw" is also required.
-
-
-* Ethernet port node
-
-Required properties:
-- compatible: Should be "ralink,eth-port"
-- reg: The number of the physical port
-- phy-handle: reference to the node describing the phy
-
-Example:
-
-mdio-bus {
-	...
-	phy0: ethernet-phy@0 {
-		phy-mode = "mii";
-		reg = <0>;
-	};
-};
-
-ethernet@400000 {
-	compatible = "ralink,rt2880-eth";
-	reg = <0x00400000 10000>;
-
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	resets = <&rstctrl 18>;
-	reset-names = "fe";
-
-	interrupt-parent = <&cpuintc>;
-	interrupts = <5>;
-
-	port@0 {
-		compatible = "ralink,eth-port";
-		reg = <0>;
-		phy-handle = <&phy0>;
-	};
-
-};

Documentation/devicetree/bindings/net/ralink,rt3050-esw.txt

-Ralink Fast Ethernet Embedded Switch
-====================================
-
-The ralink fast ethernet embedded switch can be found on Ralink and Mediatek
-SoCs (RT3x5x, RT5350, MT76x8).
-
-Required properties:
-- compatible: Should be "ralink,rt3050-esw"
-- reg: Address and length of the register set for the device
-- interrupts: Should contain the embedded switches interrupt
-- resets: Should contain the embedded switches resets
-- reset-names: Should contain the reset names "esw"
-
-Optional properties:
-- ralink,portmap: can be used to choose if the default switch setup is
-  llllw or wllll
-- ralink,led_polarity: override the active high/low settings of the leds
-
-Example:
-
-esw@10110000 {
-	compatible = "ralink,rt3050-esw";
-	reg = <0x10110000 8000>;
-
-	resets = <&rstctrl 23>;
-	reset-names = "esw";
-
-	interrupt-parent = <&intc>;
-	interrupts = <17>;
-};