qapi/crypto: Drop unwanted 'prefix'

qapi/crypto: Drop unwanted 'prefix'

QAPI's 'prefix' feature can make the connection between enumeration
type and its constants less than obvious.  It's best used with
restraint.

QCryptoAkCipherKeyType has a 'prefix' that overrides the generated
enumeration constants' prefix to QCRYPTO_AKCIPHER_KEY_TYPE.

Drop it.  The prefix becomes QCRYPTO_AK_CIPHER_KEY_TYPE.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20240904111836.3273842-11-armbru@redhat.com>