staging: brcm80211: remove macro definitions from brcmfmac Makefile

The Makefile for the brcmfmac driver contains macro definitions that
are always set. 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>