qerror: QERR_DEVICE_ENCRYPTED: change error message

Match what HMP commands print on DeviceEncrypted errors.
Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>

qerror.c

@@ -81,7 +81,7 @@ static const QErrorStringTable qerror_table[] = {
     },
     {
         .error_fmt = QERR_DEVICE_ENCRYPTED,
-        .desc      = "Device '%(device)' is encrypted",
+        .desc      = "'%(device)' (%(filename)) is encrypted",
     },
     {
         .error_fmt = QERR_DEVICE_FEATURE_BLOCKS_MIGRATION,