Staging: rtl8192e: fixed a function prototype definition issue

Added the identifier name in the function prototype definition.

Signed-off-by: Abhinav Jain <crazypsychild@gmail.com>
Link: https://lore.kernel.org/r/20190726190146.10875-1-ubuntu@ip-172-31-129-142.ec2.internal
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192e/rtllib.h

@@ -1940,7 +1940,7 @@ int rtllib_encrypt_fragment(
 	int hdr_len);
 
 int rtllib_xmit(struct sk_buff *skb,  struct net_device *dev);
-void rtllib_txb_free(struct rtllib_txb *);
+void rtllib_txb_free(struct rtllib_txb *txb);
 
 /* rtllib_rx.c */
 int rtllib_rx(struct rtllib_device *ieee, struct sk_buff *skb,