Replay "Make ifq and ifiq interface MP safe."

Took sys/arch/octeon/dev/if_cnmac.c as example from commit
cf96265.

Author: johnny-mnemonic

sys/arch/sgi/dev/if_iec.c

@@ -408,7 +408,7 @@ iec_attach(struct device *parent, struct device *self, void *aux)
 	ifp->if_watchdog = iec_watchdog;
 
 	if_attach(ifp);
-	ifq_set_maxlen(&ifp->if_snd, IEC_NTXDESC - 1);
+	ifq_init_maxlen(&ifp->if_snd, IEC_NTXDESC - 1);
 	ether_ifattach(ifp);
 
 	/* Establish interrupt handler. */

sys/arch/sgi/dev/if_mec.c

@@ -460,7 +460,7 @@ mec_attach(struct device *parent, struct device *self, void *aux)
 	ifp->if_watchdog = mec_watchdog;
 
 	if_attach(ifp);
-	ifq_set_maxlen(&ifp->if_snd, MEC_NTXDESC - 1);
+	ifq_init_maxlen(&ifp->if_snd, MEC_NTXDESC - 1);
 	ether_ifattach(ifp);
 
 	/* Establish interrupt handler. */

sys/arch/sgi/hpc/if_sq.c

@@ -362,7 +362,7 @@ sq_attach(struct device *parent, struct device *self, void *aux)
 	ifp->if_flags = IFF_BROADCAST | IFF_MULTICAST;
 
 	if_attach(ifp);
-	ifq_set_maxlen(&ifp->if_snd, SQ_NTXDESC - 1);
+	ifq_init_maxlen(&ifp->if_snd, SQ_NTXDESC - 1);
 	ether_ifattach(ifp);
 
 	if (haa->hpc_regs->revision == 3) {