be2net: fix cmd-rx-filter not notifying MCC

Dave, I missed out on this line while composing the 4/6 patch from my
yesterday's patchset ("[PATCH net-next 4/6] be2net: use RX_FILTER cmd
to program multicast addresses"). As you've already queued up the
patchset for net-next, I'm sending the fix in a separate patch. Pls
apply.

Signed-off-by: Sathya Perla <sathya.perla@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>