chardev: move greeting into vc backend.

Make the 'vc' chardev backend print a title line with the chardev name
after initialization, using CharDriverState->label.

This replaces the banner printing code in vl.c.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/console.c b/console.c
index 82ddbe4..2aeb5b3 100644
--- a/console.c
+++ b/console.c
@@ -1384,6 +1384,14 @@
     s->t_attrib = s->t_attrib_default;
     text_console_resize(s);
 
+    if (chr->label) {
+        char msg[128];
+        int len;
+
+        len = snprintf(msg, sizeof(msg), "%s console\r\n", chr->label);
+        console_puts(chr, (uint8_t*)msg, len);
+    }
+
     qemu_chr_generic_open(chr);
     if (chr->init)
         chr->init(chr);