char: rename qemu_chr_guest_close() -> qemu_chr_fe_close()

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/virtio-console.c b/hw/virtio-console.c
index 21f752b..d3351c8 100644
--- a/hw/virtio-console.c
+++ b/hw/virtio-console.c
@@ -60,7 +60,7 @@
 {
     VirtConsole *vcon = DO_UPCAST(VirtConsole, port, port);
 
-    qemu_chr_guest_close(vcon->chr);
+    qemu_chr_fe_close(vcon->chr);
 }
 
 /* Readiness of the guest to accept data on a port */