can: mcp251xfd: remove unneeded break

A break is not needed if it is preceded by a return.

Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20201019172412.31143-1-trix@redhat.com


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