iwn: zap unused function parameter from iwn_stop()

[Klemens Nanni]

Since introduction in 2007, `disable' has been unused.  Looking at
iwm(4) shows a simple `void iwm_stop(struct ifnet *)' as well.

OK?

Index: if_iwn.c
===================================================================
RCS file: /cvs/src/sys/dev/pci/if_iwn.c,v
retrieving revision 1.205
diff -u -p -r1.205 if_iwn.c
--- if_iwn.c    13 Jan 2019 22:57:37 -0000      1.205
+++ if_iwn.c    24 Jan 2019 09:20:10 -0000
@@ -278,7 +278,7 @@ int         iwn_hw_prepare(struct iwn_softc *);
 int            iwn_hw_init(struct iwn_softc *);
 void           iwn_hw_stop(struct iwn_softc *);
 int            iwn_init(struct ifnet *);
-void           iwn_stop(struct ifnet *, int);
+void           iwn_stop(struct ifnet *);
 
 #ifdef IWN_DEBUG
 #define DPRINTF(x)     do { if (iwn_debug > 0) printf x; } while (0)
@@ -754,7 +754,7 @@ iwn_activate(struct device *self, int ac
        switch (act) {
        case DVACT_SUSPEND:
                if (ifp->if_flags & IFF_RUNNING)
-                       iwn_stop(ifp, 0);
+                       iwn_stop(ifp);
                break;
        case DVACT_WAKEUP:
                iwn_wakeup(sc);
@@ -1749,7 +1749,7 @@ iwn_media_change(struct ifnet *ifp)
 
        if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
            (IFF_UP | IFF_RUNNING)) {
-               iwn_stop(ifp, 0);
+               iwn_stop(ifp);
                error = iwn_init(ifp);
        }
        return error;
@@ -2613,7 +2613,7 @@ iwn_notif_intr(struct iwn_softc *sc)
 
                        if (letoh32(*status) & 1) {
                                /* Radio transmitter is off, power down. */
-                               iwn_stop(ifp, 1);
+                               iwn_stop(ifp);
                                return; /* No further processing. */
                        }
                        break;
@@ -2824,7 +2824,7 @@ iwn_intr(void *arg)
 #ifdef IWN_DEBUG
                iwn_fatal_intr(sc);
 #endif
-               iwn_stop(ifp, 1);
+               iwn_stop(ifp);
                task_add(systq, &sc->init_task);
                return 1;
        }
@@ -3319,7 +3319,7 @@ iwn_watchdog(struct ifnet *ifp)
        if (sc->sc_tx_timer > 0) {
                if (--sc->sc_tx_timer == 0) {
                        printf("%s: device timeout\n", sc->sc_dev.dv_xname);
-                       iwn_stop(ifp, 1);
+                       iwn_stop(ifp);
                        ifp->if_oerrors++;
                        return;
                }
@@ -3351,7 +3351,7 @@ iwn_ioctl(struct ifnet *ifp, u_long cmd,
                                error = iwn_init(ifp);
                } else {
                        if (ifp->if_flags & IFF_RUNNING)
-                               iwn_stop(ifp, 1);
+                               iwn_stop(ifp);
                }
                break;
 
@@ -3379,7 +3379,7 @@ iwn_ioctl(struct ifnet *ifp, u_long cmd,
                error = 0;
                if ((ifp->if_flags & (IFF_UP | IFF_RUNNING)) ==
                    (IFF_UP | IFF_RUNNING)) {
-                       iwn_stop(ifp, 0);
+                       iwn_stop(ifp);
                        error = iwn_init(ifp);
                }
        }
@@ -6621,12 +6621,12 @@ iwn_init(struct ifnet *ifp)
 
        return 0;
 
-fail:  iwn_stop(ifp, 1);
+fail:  iwn_stop(ifp);
        return error;
 }
 
 void
-iwn_stop(struct ifnet *ifp, int disable)
+iwn_stop(struct ifnet *ifp)
 {
        struct iwn_softc *sc = ifp->if_softc;
        struct ieee80211com *ic = &sc->sc_ic;