Add toggle to disable total SW stat. This is useful
for per-queue 'packets' and 'bytes' to not conflict
with corresponding basic stats. These stats will be
added in the following patches.
Signed-off-by: Ivan Ilchenko <ivan.ilchenko@oktetlabs.ru>
Signed-off-by: Andrew Rybchenko <andrew.rybchenko@oktetlabs.ru>