[nrf fromtree] Bluetooth: host: Fix bug in disconnected handling

When disconnected only the first empty slot in the disconnected_handles
array should be updated.

Signed-off-by: Jens Rehhoff Thomsen <[email protected]>
(cherry picked from commit b478ffe)
Signed-off-by: Vinayak Kariappa Chettimada <[email protected]>

Author: jthm-ot

subsys/bluetooth/host/hci_core.c

@@ -836,6 +836,8 @@ static void conn_handle_disconnected(uint16_t handle)
 			 * handle 0 can be used as a valid non-zero handle.
 			 */
 			disconnected_handles[i] = ~BT_ACL_HANDLE_MASK | handle;
+
+			return;
 		}
 	}
 }