fix(mdns): Fix unused variable dcst warning for wifi-remote chips

 - Cover WIFI_REMOTE as well for MDNS_ESP_WIFI_ENABLED macro
 - localize `esp_netif_dhcp_status_t dcst;` declaration where used
 - Bumped patch version for mdns component

Author: vikramdattu

components/mdns/idf_component.yml

@@ -1,4 +1,4 @@
-version: "1.9.0"
+version: "1.9.1"
 description: "Multicast UDP service used to provide local network service and host discovery."
 url: "https://github.com/espressif/esp-protocols/tree/master/components/mdns"
 issues: "https://github.com/espressif/esp-protocols/issues"

components/mdns/mdns.c

@@ -33,7 +33,7 @@ static void _mdns_browse_send(mdns_browse_t *browse, mdns_if_t interface);
 #if ESP_IDF_VERSION <= ESP_IDF_VERSION_VAL(5, 1, 0)
 #define MDNS_ESP_WIFI_ENABLED CONFIG_SOC_WIFI_SUPPORTED
 #else
-#define MDNS_ESP_WIFI_ENABLED CONFIG_ESP_WIFI_ENABLED
+#define MDNS_ESP_WIFI_ENABLED (CONFIG_ESP_WIFI_ENABLED || CONFIG_ESP_WIFI_REMOTE_ENABLED)
 #endif
 
 #if MDNS_ESP_WIFI_ENABLED && (CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP)
@@ -4493,9 +4493,9 @@ void mdns_preset_if_handle_system_event(void *arg, esp_event_base_t event_base,
         return;
     }
 
-    esp_netif_dhcp_status_t dcst;
-#if MDNS_ESP_WIFI_ENABLED && (CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP)
+    #if MDNS_ESP_WIFI_ENABLED && (CONFIG_MDNS_PREDEF_NETIF_STA || CONFIG_MDNS_PREDEF_NETIF_AP)
     if (event_base == WIFI_EVENT) {
+        esp_netif_dhcp_status_t dcst;
         switch (event_id) {
         case WIFI_EVENT_STA_CONNECTED:
             if (!esp_netif_dhcpc_get_status(esp_netif_from_preset_if(MDNS_IF_STA), &dcst)) {
@@ -4522,6 +4522,7 @@ void mdns_preset_if_handle_system_event(void *arg, esp_event_base_t event_base,
 #endif
 #if CONFIG_ETH_ENABLED && CONFIG_MDNS_PREDEF_NETIF_ETH
         if (event_base == ETH_EVENT) {
+            esp_netif_dhcp_status_t dcst;
             switch (event_id) {
             case ETHERNET_EVENT_CONNECTED:
                 if (!esp_netif_dhcpc_get_status(esp_netif_from_preset_if(MDNS_IF_ETH), &dcst)) {