wifi: mac80211: spectmgmt: simplify 6 GHz HE/EHT handling

Clean up the code here a bit to have only a single call
to ieee80211_chandef_he_6ghz_oper() by using a local
pointer variable for the difference.

Link: https://msgid.link/20240312112048.94c421d767f9.Ia7ca2f315b392c74d39b44fa9eb872a2e62e75c1@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

net/mac80211/spectmgmt.c

@@ -155,6 +155,7 @@ validate_chandef_by_6ghz_he_eht_oper(struct ieee80211_sub_if_data *sdata,
 		struct ieee80211_eht_operation _oper;
 		struct ieee80211_eht_operation_info _oper_info;
 	} __packed eht;
+	const struct ieee80211_eht_operation *eht_oper;
 
 	if (conn->mode < IEEE80211_CONN_MODE_HE) {
 		chandef->chan = NULL;
@@ -203,19 +204,18 @@ validate_chandef_by_6ghz_he_eht_oper(struct ieee80211_sub_if_data *sdata,
 	}
 
 	if (conn->mode < IEEE80211_CONN_MODE_EHT) {
-		if (!ieee80211_chandef_he_6ghz_oper(local, &he._oper,
-						    NULL, chandef))
-			chandef->chan = NULL;
+		eht_oper = NULL;
 	} else {
 		eht._oper.params = IEEE80211_EHT_OPER_INFO_PRESENT;
 		eht._oper_info.control = he._6ghz_oper.control;
 		eht._oper_info.ccfs0 = he._6ghz_oper.ccfs0;
 		eht._oper_info.ccfs1 = he._6ghz_oper.ccfs1;
+		eht_oper = &eht._oper;
+	}
 
 	if (!ieee80211_chandef_he_6ghz_oper(local, &he._oper,
-						    &eht._oper, chandef))
+					    eht_oper, chandef))
 		chandef->chan = NULL;
-	}
 }
 
 int ieee80211_parse_ch_switch_ie(struct ieee80211_sub_if_data *sdata,