See Significant wifi speed increase with latest firmware - #4 by popsulfr (aka my fault 
)
Basically do
$ sudo mkdir -p /usr/lib/firmware/updates
$ sudo ln -s ../bcm/brcm /usr/lib/firmware/updates/brcm
and it should all work again.
See Significant wifi speed increase with latest firmware - #4 by popsulfr (aka my fault )
Basically do
$ sudo mkdir -p /usr/lib/firmware/updates
$ sudo ln -s ../bcm/brcm /usr/lib/firmware/updates/brcm
and it should all work again.