extmod/modbluetooth: Put declaration of connect_cancel in correct place.

This fixes a bug introduced in 851ecb2da1

Signed-off-by: Damien George <damien@micropython.org>

extmod/modbluetooth.h

@@ -371,12 +371,12 @@ int mp_bluetooth_gap_scan_stop(void);
 
 // Connect to a found peripheral.
 int mp_bluetooth_gap_peripheral_connect(uint8_t addr_type, const uint8_t *addr, int32_t duration_ms, int32_t min_conn_interval_us, int32_t max_conn_interval_us);
-#endif
-
-#if MICROPY_PY_BLUETOOTH_ENABLE_GATT_CLIENT
 
 // Cancel in-progress connection to a peripheral.
 int mp_bluetooth_gap_peripheral_connect_cancel(void);
+#endif
+
+#if MICROPY_PY_BLUETOOTH_ENABLE_GATT_CLIENT
 
 // Find all primary services on the connected peripheral.
 int mp_bluetooth_gattc_discover_primary_services(uint16_t conn_handle, const mp_obj_bluetooth_uuid_t *uuid);