RDS/IW+IB: Allow max credit advertise window.

Fix hack that restricts the credit advertisement to 127.

Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/rds/rds.h b/net/rds/rds.h
index 619f0a3..1f82ec0 100644
--- a/net/rds/rds.h
+++ b/net/rds/rds.h
@@ -132,7 +132,7 @@
 #define RDS_FLAG_CONG_BITMAP	0x01
 #define RDS_FLAG_ACK_REQUIRED	0x02
 #define RDS_FLAG_RETRANSMITTED	0x04
-#define RDS_MAX_ADV_CREDIT	127
+#define RDS_MAX_ADV_CREDIT	255
 
 /*
  * Maximum space available for extension headers.