Staging: brcm80211: remove unused ALIGN_ADDR() macro

It's not used (and there's a kernel provided one if it's ever needed in
the future), so remove it.

Cc: Brett Rudley <brudley@broadcom.com>
Cc: Henry Ptasinski <henryp@broadcom.com>
Cc: Nohee Ko <noheek@broadcom.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>