Bluetooth: Host: Fix some MISRA c:M23_112 warnings

Fix some "All if ... else if constructs shall be terminated
with an else clause" (c:M23_112) issues reported by SonarQube.

Signed-off-by: Christophe Dufaza <[email protected]>

Author: dottspina

subsys/bluetooth/host/conn.c

@@ -2291,6 +2291,10 @@ static void deferred_work(struct k_work *work)
 				err);
 		}
 #endif
+	} else {
+		/* Neither the application nor the configuration
+		 * set LE connection parameters.
+		 */
 	}
 
 	atomic_set_bit(conn->flags, BT_CONN_PERIPHERAL_PARAM_UPDATE);
@@ -2393,6 +2397,8 @@ struct bt_conn *bt_conn_add_sco(const bt_addr_t *peer, int link_type)
 	} else if (link_type == BT_HCI_ESCO) {
 		sco_conn->sco.pkt_type = (bt_dev.br.esco_pkt_type &
 					  ~EDR_ESCO_PKT_MASK);
+	} else {
+		/* Ignoring unexpected link type BT_HCI_ACL. */
 	}
 
 	return sco_conn;