nr rlc: discarding a packet when RX buffer is full is a warning

We want to see it. It's not normal, may disturb the system.

openair2/LAYER2/nr_rlc/nr_rlc_entity_am.c

@@ -833,7 +833,7 @@ void nr_rlc_entity_am_recv_pdu(nr_rlc_entity_t *_entity,
 
   /* dicard PDU if rx buffer is full */
   if (entity->rx_size + data_size > entity->rx_maxsize) {
-    LOG_D(RLC, "%s:%d:%s: warning: discard PDU, RX buffer full\n",
+    LOG_W(RLC, "%s:%d:%s: warning: discard PDU, RX buffer full\n",
           __FILE__, __LINE__, __FUNCTION__);
     goto discard;
   }