Add mbed patch for correct WHD disconnection

Author: facchinm

patches/0174-WHD-force-disconnect-on-roamed-due-to-low-RSSI.patch

@@ -0,0 +1,28 @@
+From 7d59d1e04f2cc6872d07c30cb6f66457dbd383f2 Mon Sep 17 00:00:00 2001
+From: pennam <m.pennasilico@arduino.cc>
+Date: Thu, 11 Aug 2022 10:29:34 +0200
+Subject: [PATCH] WHD: force disconnect on roamed due to low RSSI
+
+---
+ .../drivers/emac/COMPONENT_WHD/interface/WhdSTAInterface.cpp | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/connectivity/drivers/emac/COMPONENT_WHD/interface/WhdSTAInterface.cpp b/connectivity/drivers/emac/COMPONENT_WHD/interface/WhdSTAInterface.cpp
+index 6fec15adb0..509a2c0981 100644
+--- a/connectivity/drivers/emac/COMPONENT_WHD/interface/WhdSTAInterface.cpp
++++ b/connectivity/drivers/emac/COMPONENT_WHD/interface/WhdSTAInterface.cpp
+@@ -178,7 +178,10 @@ static void *whd_wifi_link_state_change_handler(whd_interface_t ifp,
+             (event_header->event_type == WLC_E_DISASSOC_IND) ||
+             ((event_header->event_type == WLC_E_PSK_SUP) &&
+             (event_header->status == WLC_SUP_KEYED) &&
+-            (event_header->reason == WLC_E_SUP_DEAUTH))) {
++            (event_header->reason == WLC_E_SUP_DEAUTH)) ||
++            ((event_header->event_type == WLC_E_LINK) &&
++            (event_header->status == WLC_E_STATUS_SUCCESS) &&
++            (event_header->reason == WLC_E_REASON_LOW_RSSI))) {
+         whd_emac_wifi_link_state_changed(ifp, WHD_FALSE);
+         return handler_user_data;
+     }
+-- 
+2.37.1
+