Spell powersavesleep correctly.

usr.sbin/wicontrol/wicontrol.8

@@ -513,7 +513,7 @@ values for this parameter are
 This flag is obsolete.
 The
 .Xr ifconfig 8
-.Cm powersleep
+.Cm powersavesleep
 should be used instead.
 .Pp
 Specify the sleep interval to use when power management is enabled.

usr.sbin/wicontrol/wicontrol.c

@@ -1190,7 +1190,7 @@ main(int argc, char *argv[])
 			exit(0);
 			break;
 		case 'S':
-			dep("S", "powersleep");
+			dep("S", "powersavesleep");
 			wi_setword(iface, WI_RID_MAX_SLEEP, atoi(optarg));
 			exit(0);
 			break;