can: dev: fix semicolon.cocci warnings

drivers/net/can/dev.c:294:2-3: Unneeded semicolon

 Removes unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

Cc: Andri Yngvason <andri.yngvason@marel.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>