qemu_process: fix debug message

Be generic instead of trying to enumerate all the involved
device types.
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

src/qemu/qemu_process.c

@@ -6051,7 +6051,7 @@ qemuProcessPrepareDomain(virQEMUDriverPtr driver,
     VIR_DEBUG("Prepare chardev source backends for TLS");
     qemuDomainPrepareChardevSource(vm->def, cfg);
 
-    VIR_DEBUG("Add secrets to hostdevs and chardevs");
+    VIR_DEBUG("Prepare device secrets");
     if (qemuDomainSecretPrepare(driver, vm) < 0)
         goto cleanup;