dt-bindings: can: xilinx_can: Modify the title to indicate CAN and CANFD controllers are supported

Xilinx CAN binding documentation supports CAN and CANFD controllers.
Modify the title to indicate that both controllers are supported.

Signed-off-by: Harini T <harini.t@amd.com>
Link: https://lore.kernel.org/all/20240503060553.8520-2-harini.t@amd.com


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>