arm64: dts: renesas: gray-hawk-single: Add CAN-FD support

Enable confirmed-working CAN-FD channels 0 and 1 on the Gray Hawk Single
development board:
  - Channel 0 uses an NXP TJR1443AT CAN transceiver, which must be
    enabled through a GPIO,
  - Channels 1-3 use Microchip MCP2558FD-H/SN CAN transceivers, which do
    not need explicit description, but channels 2-3 do not seem to work.

Inspired by a patch for Gray Hawk in the BSP by Duy Nguyen.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/7c2a06b7abec4ce1025761003ccdbce559789708.1722519717.git.geert+renesas@glider.be