Phytium CAN controller
------------------------

Required properties:
- compatible: Should be:
              - "phytium,can" for Phytium CAN controllers
              - "phytium,canfd" for Phytium CAN controllers with CANFD support
- reg: Should contain CANFD controller registers location and length
- interrupts: Should contain IRQ line for the CANFD controller
- clocks: CLocks used by the controller
- clock-names: Input clock names, should be "can_clk"
- tx-fifo-depth: Indicates the length of TX FIFO
- rx-fifo-depth: Indicates the length of TX FIFO

Optional property:
- extend_brp: Indicates to apply the extend BRP parameter of bit timming for
              early version of CAN controller

Example:

	can0: can@2800a000{
		compatible = "phytium,canfd";
		reg = <0x0 0x2800a000 0x0 0x1000>;
		interrupts = <GIC_SPI 81 IRQ_TYPE_LEVEL_HIGH>;
		clocks = <&sysclk_600mhz>;
		clock-names = "can_clk";
		tx-fifo-depth = <64>;
		rx-fifo-depth = <64>;
	};
