staging: brcm80211: replaced WL_TRACE by BCMMSG

Code cleanup. Make code more readable by converting different macro's
(WL_TRACE, WL_AMPDU, etc) into one BCMMSG. This single macro uses wiphy_err()
instead of printk(), so the user is able to correlate a log
message to our driver. This patch only replaces WL_TRACE, subsequent patches
will replace WL_AMPDU etc.

Cc: devel@linuxdriverproject.org
Cc: linux-wireless@vger.kernel.org
Cc: Brett Rudley <brudley@broadcom.com>
Cc: Henry Ptasinski <henryp@broadcom.com>
Cc: Roland Vossen <rvossen@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>