bcmdhd4358: WIFI PM support for KitKat driver [halaszk]

11/12/2014 ported from BCMDHD to BCMDHD4358 Samsung Galaxy Note Edge by UpInTheAir
config: enable BCMDHD_WIFI_PM
bcmdhd4358: filter multicast packages while suspended [halaszk]

In some crowded WLANs, with a lot of multicast packages circulating, the device would not enter deep sleep. This will allow the device to enter deep sleep.

11Dec2014 – Adjusted from bcmdhd to bcmdhd4358 by UpInTheAir