wifi-scripts: fix phy index lookup in device_capabilities

For renamed phys, the index cannot be derived from the name

Signed-off-by: Felix Fietkau <[email protected]>

package/network/config/wifi-scripts/files-ucode/usr/share/ucode/wifi/hostapd.uc

@@ -437,7 +437,7 @@ function device_extended_features(data, flag) {
 }
 
 function device_capabilities(phy) {
-	let idx = +substr(phy, 3, 1);;
+	let idx = +fs.readfile(`/sys/class/ieee80211/${phy}/index`);
 	phy = nl80211.request(nl80211.const.NL80211_CMD_GET_WIPHY, nl80211.const.NLM_F_DUMP, { wiphy: idx, split_wiphy_dump: true });
 	if (!phy)
 		return;