staging: brcm80211: remove unnecessary macro defintions

The common makefile and the fullmac makefile contained a few
macro definitions that are not or no longer used. These are
removed.

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