brcmfmac & DEL_INTERFACE

[Denis Kenzior]

Hi Arend,

We noticed that brcmfmac doesn't support .del_virtual_intf for 
non-p2p/ap interface types.  Any chance this can be added?

We currently remove all wifi interfaces and re-create the needed ones 
with SOCKET_OWNER set, and it would be nice if we didn't need to treat 
brcmfmac specially.

Regards,
-Denis