Update the documentation to describe the changes added by
commit 8ba38460 ("net/rds Add getsockopt support for SO_RDS_TRANSPORT")
Acked-by: NSantosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: NSowmini Varadhan <sowmini.varadhan@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>