[ethernet/broadcom/bgmac]: Implement software multicast filter clear

[Ujwal Kundur]

Hi,
   I'm trying to work on a few TODOs in the
drivers/net/ethernet/broadcom/bgmac.c driver code and came across the
"Clear software multicast filter list" item.
   I tried comparing the multicast filter implementation of the
sb1250-mac.c driver for inspiration but realized that most of the code
for bgmac has been written by reverse-engineering the specs:
   hhttps://bcm-v4.sipsolutions.net/Specification/

   I'd like to try my hand at this if there are documents/guides
around this topic or if there's a canonical source for the binary that
I can try reverse engineering. Please let me know if you have any
leads/advice.

   Apologies if this is misdirected, I've just started to get into
Linux kernel development / networking stack.

Thanks,
            Ujwal Kundur