mkfs.ubifs: fix broken build if fscrtyp is disabled

mkfs.ubifs: fix broken build if fscrtyp is disabled

First, there is no option named of X509_OPTION. It was presumably
changed during development to AUTH_CERT_OPTION. This commit fixes
the name in the !WITH_CRYPTO branch.

Similarly, '}' got moved into the WITH_CRYPTO branch, but not into
else branch, resulting in tons of errors if fscrypt is disabled.
This commit pulls it back out of both branches.

Fixes: a739b59e ("mkfs.ubifs: Add authentication support")
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>