Pass the size of the buffer where the item's mask
is stored and not the indirection pointer size.
Coverity issue: 363735
Fixes: dadff13793 ("net/sfc: support encap flow items in transfer rules")
Cc: stable@dpdk.org
Signed-off-by: Ivan Malov <ivan.malov@oktetlabs.ru>
Reviewed-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>
Reviewed-by: Andy Moreton <amoreton@xilinx.com>