vnet: print func name in "out of order" message

[Klemens Nanni]

Jul 23 14:43:02 t4 /bsd: out of order

That's a pretty generic message and I currently see a few on my primary
domain.

I'd like a bit of context in dmesg;  this will also turn it up if I grep
for "vnet" which I often do.

Feedback? OK?


Index: vnet.c
===================================================================
RCS file: /cvs/src/sys/arch/sparc64/dev/vnet.c,v
retrieving revision 1.65
diff -u -p -r1.65 vnet.c
--- vnet.c      20 Jul 2022 21:03:10 -0000      1.65
+++ vnet.c      25 Jul 2022 14:05:00 -0000
@@ -768,7 +768,7 @@ vnet_rx_vio_desc_data(struct vnet_softc 
                DPRINTF(("DATA/ACK/DESC_DATA\n"));
 
                if (dm->desc_handle != sc->sc_tx_cons) {
-                       printf("out of order\n");
+                       printf("%s: out of order\n", __func__);
                        return;
                }