bcmdhd: Change packet filter settings to block multicast

A common complaint of users is that battery life on wifi
is very poor, with frequent wlan_rx_wake wakelocks.

It turns out Samsung "opened up" the packet filter
settings from Gingerbread to ICS.

This makes them match the tuna configuration, minus
the filter to allow mDNS through (which lets a bunch
of other stuff through too.)

The original patch reverted to Gingerbread settings,
but it seems like the filter definitions changed
from GB to ICS.

Change-Id: Ib56d50374d86733f9a2893b5a4afbcc6cd859a75
Signed-off-by: Andrew Dodd <atd7@cornell.edu>