staging: brcm80211: remove ioctl layer from brcmsmac

The ioctl layer in brcmsmac only provided an interface layer that
was internal to the driver. This is considered pointless and has
been removed.

Reported-by: Johannes Berg <johannes@sipsolutions.net>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>