The A10 SoC has an on-board CAN controller.
This patch adds the device node.

This patch is adapted from the description in
Documentation/devicetree/bindings/net/can/sun4i_can.txt
Signed-off-by: Patrick Menschel <menschel.p@posteo.de>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>