Don't return errors from the cryptodev_process() method.

The cryptodev_process() method should either return 0 if it has
completed a request, or ERESTART to defer the request until later. If
a request encounters an error, the error should be reported via
crp_etype before completing the request via crypto_done().

Fix a few more drivers noticed by asomers@ similar to the fix in
r365389. This is an old bug, but went unnoticed since crypto requests
did not start failing as a normal part of operation until digest
verification was introduced which can fail requests with EBADMSG.

PR: 247986
Reported by: asomers
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D26361