Staging: brcm80211: remove FALSE #define

use the kernel provided 'false' value instead, especially
as we are using a 'bool' for these variables.

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>