RDS: Fix ordering in a conditional

Putting the constant first is a supposed "best practice" that actually makes
the code harder to read.

Thanks to Roland Dreier for finding a bug in this "simple, obviously correct"
patch.

Signed-off-by: Andy Grover <andy.grover@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
1 file changed