staging: brcm80211: remove macro definitions from brcmsmac Makefile

The Makefile for the brcmsmac driver contains macro definitions that
are always set and even some are not used in the source code anymore.
This patch removes those definitions from the Makefile and source code.

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