qcacld-3.0: Avoid NULL pointer dereference

Function mlme_get_dynamic_oce_flags can return the NULL value.
Avoid and check for NULL pointer in the callers.

Change-Id: Idc83a9e5dea812a73fed24de3aa2c2c49436f7d1
CRs-Fixed: 2462716

mlme/dispatcher/src/wlan_mlme_api.c

@@ -1956,6 +1956,8 @@ static void wlan_mlme_send_oce_flags_fw(struct wlan_objmgr_pdev *pdev,
 
 	if (wlan_vdev_mlme_get_opmode(vdev) == QDF_STA_MODE) {
 		dynamic_fw_value = mlme_get_dynamic_oce_flags(vdev);
+		if (!dynamic_fw_value)
+			return;
 		if (*updated_fw_value == *dynamic_fw_value) {
 			mlme_legacy_debug("Current FW flags matches with updated value.");
 			return;