staging: brcm80211: Remove flags from wl_is_nonetwork

Remove this debug only variable in fullmace driver to avoid compile
warning when BCMDBG is off

Signed-off-by: Franky Lin <frankyl@broadcom.com>
Reviewed-by: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>