mac80211: Allow a STA to join an IBSS with 80+80 MHz channel

While it was possible to create an IBSS with 80+80 MHz channel, joining
such an IBSS resulted in falling back to 20 MHz channel with VHT
disabled due to a missing switch case for 80+80.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 337bb5d..f7fc0e0 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -428,6 +428,7 @@
 		chandef.width = sdata->u.ibss.chandef.width;
 		break;
 	case NL80211_CHAN_WIDTH_80:
+	case NL80211_CHAN_WIDTH_80P80:
 	case NL80211_CHAN_WIDTH_160:
 		chandef = sdata->u.ibss.chandef;
 		chandef.chan = cbss->channel;