Bluetooth: Fix checkpatch error in cmtp.h

Do not use C99 // comments.

Signed-off-by: Szymon Janc <szymon.janc@tieto.com>
Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
diff --git a/net/bluetooth/cmtp/cmtp.h b/net/bluetooth/cmtp/cmtp.h
index 785e79e..c6f78f8 100644
--- a/net/bluetooth/cmtp/cmtp.h
+++ b/net/bluetooth/cmtp/cmtp.h
@@ -37,7 +37,7 @@
 #define CMTP_LOOPBACK	0
 
 struct cmtp_connadd_req {
-	int   sock;	// Connected socket
+	int   sock;	/* Connected socket */
 	__u32 flags;
 };