Zero high order word of fast memory registration (FMR) length field.
FMR length field is 32 bits, so high word should always be zero.
Signed-off-by: NTatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Signed-off-by: NDonald Wood <Donald.E.Wood@intel.com>
Signed-off-by: NRoland Dreier <roland@purestorage.com>