qapi/crypto: Rename QCryptoIVGenAlgorithm to *Algo, and drop prefix

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

QCryptoIVGenAlgorithm has a 'prefix' that overrides the generated
enumeration constants' prefix to QCRYPTO_IVGEN_ALG.

We could simply drop 'prefix', but then the prefix becomes
QCRYPTO_IV_GEN_ALGORITHM, which is rather long.

We could additionally rename the type to QCryptoIVGenAlg, but I think
the abbreviation "alg" is less than clear.

Rename the type to QCryptoIVGenAlgo instead.  The prefix becomes
QCRYPTO_IV_GEN_ALGO.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Daniel P. Berrangé <berrange@redhat.com>
Message-ID: <20240904111836.3273842-14-armbru@redhat.com>
diff --git a/crypto/ivgenpriv.h b/crypto/ivgenpriv.h
index ef24c76..e3388d3 100644
--- a/crypto/ivgenpriv.h
+++ b/crypto/ivgenpriv.h
@@ -40,7 +40,7 @@
     QCryptoIVGenDriver *driver;
     void *private;
 
-    QCryptoIVGenAlgorithm algorithm;
+    QCryptoIVGenAlgo algorithm;
     QCryptoCipherAlgo cipher;
     QCryptoHashAlgo hash;
 };