ON Semiconductor USB Type-C and display port 10Gbps Linear Re-Driver

Required properties:
- compatible: Must be "onnn,redriver".
- reg: I2C address on the selected bus.
- extcon: phandles to external connector devices. The first phandle
	should point to the external connector which provides
	both "USB" cable events and "USB-HOST" cable events.
	An optional second phandle may be specified for DP
	lane events.

Optional properties:
- eq: Equalization value of re-driver channel A/B/C/D, 8 bit.
	eq[0] - eq[3]: Channel A-D parameter for USB.
	eq[4] - eq[7]: Channel A-D parameter for DP.
- flat-gain: Flat gain control value of re-driver channel A/B/C/D, 8 bit.
	flat_gain[0] - flat_gain[3]: Channel A-D parameter for USB.
	flat_gain[4] - flat_gain[7]: Channel A-D parameter for DP.
- output-comp: Output compression value of re-driver channel A/B/C/D,
8 bit.
	output_comp[0] - output_comp[3]: Channel A-D parameter for USB.
	output_comp[4] - output_comp[7]: Channel A-D parameter for DP.
- loss-match: Loss profile matching control value of re-driver channel
A/B/C/D, 8 bit.
	loss_match[0] - loss_match[3]: Channel A-D parameter for USB.
	loss_match[4] - loss_match[7]: Channel A-D parameter for DP.
- lane-channel-swap: in most design,
	channel A for RX1, channel B for TX1,
	channel C for TX0, channel D for RX0.
	enable this property if your design have following assignment,
	channel A for RX0, channel B for TX0,
	channel C for TX1, channel D for RX1.

Example:
	redriver@19 {
		compatible = "onnn,redriver";
		reg = <0x19>;
		extcon = <&pm8150b_pdphy>, <&pm8150b_pdphy>;
		eq = /bits/ 8 <
				/* Parameters for USB */
				0x4 0x4 0x4 0x4
				/* Parameters for DP */
				0x6 0x4 0x4 0x6>;
		flat-gain = /bits/ 8 <
				/* Parameters for USB */
				0x3 0x1 0x1 0x3
				/* Parameters for DP */
				0x2 0x1 0x1 0x2>;
		output-comp = /bits/ 8 <
				/* Parameters for USB */
				0x3 0x3 0x3 0x3
				/* Parameters for DP */
				0x3 0x3 0x3 0x3>;
		loss-match = /bits/ 8 <
				/* Parameters for USB */
				0x1 0x3 0x3 0x1
				/* Parameters for DP */
				0x3 0x3 0x3 0x3>;
	};
