can: xilinx_can: Add support for controller reset

Add support for an optional reset for the CAN controller using the reset
driver. If the CAN node contains the "resets" property, then this logic
will perform CAN controller reset.

Signed-off-by: Srinivas Neeli <srinivas.neeli@amd.com>
Signed-off-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/all/ab7e6503aa3343e39ead03c1797e765be6c50de2.1689164442.git.michal.simek@amd.com


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