Bluetooth: Simplify setting Configuration Field

Only Sliding Window Size is used at the moment for H5 Bluetooth
Configuration messages.

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
diff --git a/drivers/bluetooth/hci_h5.c b/drivers/bluetooth/hci_h5.c
index fc1a499..2d1c9f6 100644
--- a/drivers/bluetooth/hci_h5.c
+++ b/drivers/bluetooth/hci_h5.c
@@ -116,12 +116,8 @@
 
 static u8 h5_cfg_field(struct h5 *h5)
 {
-	u8 field = 0;
-
 	/* Sliding window size (first 3 bits) */
-	field |= (h5->tx_win & 0x07);
-
-	return field;
+	return h5->tx_win & 0x07;
 }
 
 static void h5_timed_event(unsigned long arg)