tpm: Avoid qerror_report() outside QMP command handlers

qerror_report() is a transitional interface to help with converting
existing monitor commands to QMP.  It should not be used elsewhere.
Replace by error_report().

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Luiz Capitulino <lcapitulino@redhat.com>

tpm.c

@@ -140,22 +140,21 @@ static int configure_tpm(QemuOpts *opts)
 
     id = qemu_opts_id(opts);
     if (id == NULL) {
-        qerror_report(ERROR_CLASS_GENERIC_ERROR, QERR_MISSING_PARAMETER, "id");
+        error_report(QERR_MISSING_PARAMETER, "id");
         return 1;
     }
 
     value = qemu_opt_get(opts, "type");
     if (!value) {
-        qerror_report(ERROR_CLASS_GENERIC_ERROR, QERR_MISSING_PARAMETER,
-                      "type");
+        error_report(QERR_MISSING_PARAMETER, "type");
         tpm_display_backend_drivers();
         return 1;
     }
 
     be = tpm_get_backend_driver(value);
     if (be == NULL) {
-        qerror_report(ERROR_CLASS_GENERIC_ERROR, QERR_INVALID_PARAMETER_VALUE,
-                      "type", "a TPM backend type");
+        error_report(QERR_INVALID_PARAMETER_VALUE,
+                     "type", "a TPM backend type");
         tpm_display_backend_drivers();
         return 1;
     }