wireless/bluetooth and include/nuttx/wireless/bluetooth: Remove unnecessary gatt ioctls

wireless/bluetooth/bt_conn.h

@@ -108,6 +108,10 @@ struct bt_conn_s
   uint8_t le_conn_interval;
   bt_atomic_t ref;
   enum bt_conn_state_e state;
+
+  /* Temporary data used by ioctl */
+
+  void *p_iostate;
 };
 
 /****************************************************************************

wireless/bluetooth/bt_gatt.c

@@ -855,6 +855,14 @@ static void att_read_type_rsp(FAR struct bt_conn_s *conn, uint8_t err,
       goto done;
     }
 
+  /* Next characteristic shall be after current value handle */
+
+  params->start_handle = handle;
+  if (params->start_handle < UINT16_MAX)
+    {
+      params->start_handle++;
+    }
+
   /* Stop if over the requested range */
 
   if (params->start_handle >= params->end_handle)