drivers: can: common: Fix uninitializes sjw
drivers: can: common: Fix uninitializes sjw

Fix coverity CID 216784.
SJW was not initialized in the tmp_res, but got copied
to the result pointer, which overwrites the value.

Signed-off-by: Alexander Wachter <e46fc836cca3acec03944314d1457c2ae6c68ef3@wachter.cloud>

galak/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,Vudentz/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,finikorg/zephyr,Vudentz/zephyr,nashif/zephyr,nashif/zephyr,galak/zephyr,nashif/zephyr,nashif/zephyr,finikorg/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,finikorg/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,zephyrproject-rtos/zephyr,finikorg/zephyr,galak/zephyr,nashif/zephyr