wifi-scripts: don't set wpa_pairwise for wpa=0

Without this patch, the

    if (!config.wpa)
	  	config.wpa_pairwise = null;

is overwritten immediately.

Signed-off-by: Leon M. Busch-George <[email protected]>
Link: openwrt/openwrt#21215
Signed-off-by: Robert Marko <[email protected]>

Author: yogo1212

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

@@ -16,10 +16,11 @@ export function parse_encryption(config, dev_config) {
 			config.wpa = v;
 			break;
 		}
-	if (!config.wpa)
-		config.wpa_pairwise = null;
 
-	config.wpa_pairwise = (config.hw_mode == 'ad') ? 'GCMP' : 'CCMP';
+	config.wpa_pairwise = null;
+	if (config.wpa)
+		config.wpa_pairwise = (config.hw_mode == 'ad') ? 'GCMP' : 'CCMP';
+
 	config.auth_type = encryption[0] ?? 'none';
 
 	let wpa3_pairwise = config.wpa_pairwise;