Bluetooth: Use __constant modifier for RFCOMM PSM

Since the RFCOMM_PSM is constant, __constant_cpu_to_le16() is
the right go here.
Signed-off-by: NSyam Sidhardhan <s.syam@samsung.com>
Acked-by: NMarcel Holtmann <marcel@holtmann.org>
Signed-off-by: NGustavo Padovan <gustavo.padovan@collabora.co.uk>

net/bluetooth/rfcomm/core.c

@@ -709,7 +709,7 @@ static struct rfcomm_session *rfcomm_session_create(bdaddr_t *src,
 
 	bacpy(&addr.l2_bdaddr, dst);
 	addr.l2_family = AF_BLUETOOTH;
-	addr.l2_psm    = cpu_to_le16(RFCOMM_PSM);
+	addr.l2_psm    = __constant_cpu_to_le16(RFCOMM_PSM);
 	addr.l2_cid    = 0;
 	*err = kernel_connect(sock, (struct sockaddr *) &addr, sizeof(addr), O_NONBLOCK);
 	if (*err == 0 || *err == -EINPROGRESS)
@@ -1987,7 +1987,7 @@ static int rfcomm_add_listener(bdaddr_t *ba)
 	/* Bind socket */
 	bacpy(&addr.l2_bdaddr, ba);
 	addr.l2_family = AF_BLUETOOTH;
-	addr.l2_psm    = cpu_to_le16(RFCOMM_PSM);
+	addr.l2_psm    = __constant_cpu_to_le16(RFCOMM_PSM);
 	addr.l2_cid    = 0;
 	err = kernel_bind(sock, (struct sockaddr *) &addr, sizeof(addr));
 	if (err < 0) {