ipsec: ikev2 can handle multiple phase 1 with the same IP

PR: https://github.com/opnsense/core/issues/1714
(cherry picked from commit 738f9983)

src/www/vpn_ipsec_phase1.php

@@ -231,7 +231,8 @@ if ($_SERVER['REQUEST_METHOD'] === 'GET') {
         }
     }
 
-    if ((!empty($pconfig['remote-gateway']) && is_ipaddr($pconfig['remote-gateway']) && !isset($pconfig['disabled']) )) {
+    if (!empty($pconfig['remote-gateway']) && is_ipaddr($pconfig['remote-gateway']) && !isset($pconfig['disabled']) &&
+        (empty($pconfig['iketype']) || $pconfig['iketype'] == "ikev1")) {
         $t = 0;
         foreach ($a_phase1 as $ph1tmp) {
             if ($p1index <> $t) {