QemuOpts: repurpose qemu_opts_print to replace print_option_parameters

Currently this function is not used anywhere. In later patches, it will
replace print_option_parameters. To avoid print info changes, change
qemu_opts_print from fprintf stderr to printf, and remove last printf.
Signed-off-by: NChunyan Liu <cyliu@suse.com>
Reviewed-by: NEric Blake <eblake@redhat.com>
Signed-off-by: NStefan Hajnoczi <stefanha@redhat.com>

include/qemu/option.h

@@ -156,7 +156,7 @@ QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict);
 void qemu_opts_absorb_qdict(QemuOpts *opts, QDict *qdict, Error **errp);
 
 typedef int (*qemu_opts_loopfunc)(QemuOpts *opts, void *opaque);
-int qemu_opts_print(QemuOpts *opts, void *dummy);
+void qemu_opts_print(QemuOpts *opts);
 int qemu_opts_foreach(QemuOptsList *list, qemu_opts_loopfunc func, void *opaque,
                       int abort_on_failure);
 

util/qemu-option.c

@@ -895,17 +895,15 @@ void qemu_opts_del(QemuOpts *opts)
     g_free(opts);
 }
 
-int qemu_opts_print(QemuOpts *opts, void *dummy)
+void qemu_opts_print(QemuOpts *opts)
 {
     QemuOpt *opt;
 
-    fprintf(stderr, "%s: %s:", opts->list->name,
-            opts->id ? opts->id : "<noid>");
+    printf("%s: %s:", opts->list->name,
+           opts->id ? opts->id : "<noid>");
     QTAILQ_FOREACH(opt, &opts->head, next) {
-        fprintf(stderr, " %s=\"%s\"", opt->name, opt->str);
+        printf(" %s=\"%s\"", opt->name, opt->str);
     }
-    fprintf(stderr, "\n");
-    return 0;
 }
 
 static int opts_do_parse(QemuOpts *opts, const char *params,