fscrypt: don't special-case EOPNOTSUPP from fscrypt_get_encryption_info()

In fscrypt_setup_filename(), remove the unnecessary check for
fscrypt_get_encryption_info() returning EOPNOTSUPP.  There's no reason
to handle this error differently from any other.  I think there may have
been some confusion because the "notsupp" version of
fscrypt_get_encryption_info() returns EOPNOTSUPP -- but that's not
applicable from inside fs/crypto/.

Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/crypto/fname.c

@@ -335,7 +335,7 @@ int fscrypt_setup_filename(struct inode *dir, const struct qstr *iname,
 		return 0;
 	}
 	ret = fscrypt_get_encryption_info(dir);
-	if (ret && ret != -EOPNOTSUPP)
+	if (ret)
 		return ret;
 
 	if (dir->i_crypt_info) {