canopen: CO_driver: Fix Coverity issues (NULL deref, dead code)

There were two dereference after NULL check and logical dead code.

Fixes #22434
Fixes #22443
Fixes #22435
Coverity-CID: 207978
Coverity-CID: 207977
Coverity-CID: 207964

Signed-off-by: Alexander Wachter <alexander@wachter.cloud>
1 file changed