Staging: lustre: Remove int typecast of offsetof().

Remove int typecast of offsetof().
As per below coccinelle rule:

@@
type T;
expression E;
@@
- (int)(offsetof(T,E))
+ offsetof(T,E)
Signed-off-by: Sandhya Bankar <bankarsandhya512@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lnet/klnds/socklnd/socklnd.h

@@ -283,7 +283,7 @@ typedef struct                             /* transmit packet */
 	} tx_frags;
 } ksock_tx_t;
 
-#define KSOCK_NOOP_TX_SIZE ((int)offsetof(ksock_tx_t, tx_frags.paged.kiov[0]))
+#define KSOCK_NOOP_TX_SIZE (offsetof(ksock_tx_t, tx_frags.paged.kiov[0]))
 
 /* network zero copy callback descriptor embedded in ksock_tx_t */