drv/bluetooth_stm32_bluenrg: fix wait for status on disconnect

When we send a disconnect command (GAP Terminate), the controller
responds with a command status event rather than a command complete
event.

This fixes Bluetooth comms locking up until something else triggers
a command complete event.

lib/pbio/drv/bluetooth/bluetooth_stm32_bluenrg.c

@@ -659,7 +659,7 @@ static PT_THREAD(disconnect_remote_task(struct pt *pt, pbio_task_t *task)) {
 
     PT_WAIT_WHILE(pt, write_xfer_size);
     aci_gap_terminate_begin(remote_handle, HCI_OE_USER_ENDED_CONNECTION);
-    PT_WAIT_UNTIL(pt, hci_command_complete);
+    PT_WAIT_UNTIL(pt, hci_command_status);
     aci_gap_terminate_end();
 
     PT_WAIT_UNTIL(pt, remote_handle == 0);