mac80211: set short_slot for 6 GHz band

Set short slot also for 6 GHz band, just like 5 GHz.
Signed-off-by: Tova Mussai <tova.mussai@intel.com>
Link: https://lore.kernel.org/r/20200528213443.75f38e6f5efd.I272fbae402b03123f04e9ae69204eeab960c70cd@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/cfg.c

@@ -2198,7 +2198,8 @@ static int ieee80211_change_bss(struct wiphy *wiphy,
 	}
 
 	if (!sdata->vif.bss_conf.use_short_slot &&
-	    sband->band == NL80211_BAND_5GHZ) {
+	    (sband->band == NL80211_BAND_5GHZ ||
+	     sband->band == NL80211_BAND_6GHZ)) {
 		sdata->vif.bss_conf.use_short_slot = true;
 		changed |= BSS_CHANGED_ERP_SLOT;
 	}

net/mac80211/mlme.c

@@ -2171,7 +2171,8 @@ static u32 ieee80211_handle_bss_capability(struct ieee80211_sub_if_data *sdata,
 	}
 
 	use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME);
-	if (sband->band == NL80211_BAND_5GHZ)
+	if (sband->band == NL80211_BAND_5GHZ ||
+	    sband->band == NL80211_BAND_6GHZ)
 		use_short_slot = true;
 
 	if (use_protection != bss_conf->use_cts_prot) {