cfg80211: use same IR permissive rules for 6GHz band

The function cfg80211_ir_permissive_chan() is applicable for
6GHz band as well so make sure it is handled.
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Leon Zegers <leon.zegers@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Link: https://lore.kernel.org/r/1564745465-21234-7-git-send-email-arend.vanspriel@broadcom.comSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/chan.c

@@ -894,7 +894,8 @@ static bool cfg80211_ir_permissive_chan(struct wiphy *wiphy,
 		if (chan == other_chan)
 			return true;
 
-		if (chan->band != NL80211_BAND_5GHZ)
+		if (chan->band != NL80211_BAND_5GHZ &&
+		    chan->band != NL80211_BAND_6GHZ)
 			continue;
 
 		r1 = cfg80211_get_unii(chan->center_freq);