net:gue.h:Fix shifting signed 32-bit value by 31 bits problem

Fix GUE_PFLAG_REMCSUM to use "U" cast to avoid shifting signed
32-bit value by 31 bits problem.
Signed-off-by: Vandana BN <bnvandana@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/gue.h

@@ -60,7 +60,7 @@ struct guehdr {
 
 /* Private flags in the private option extension */
 
-#define GUE_PFLAG_REMCSUM	htonl(1 << 31)
+#define GUE_PFLAG_REMCSUM	htonl(1U << 31)
 #define GUE_PLEN_REMCSUM	4
 
 #define GUE_PFLAGS_ALL	(GUE_PFLAG_REMCSUM)