can: xilinx_can: Simplify code by using dev_err_probe()

Use already prepared dev_err_probe() introduced by commit a787e540
("driver core: add device probe log helper").
It simplifies EPROBE_DEFER handling.

Also unify message format for similar error cases.

Link: https://lore.kernel.org/r/91af0945ed7397b08f1af0c829450620bd92b804.1612442564.git.michal.simek@xilinx.com


Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>