firmware/WHENCE: Add missing origin information for Ambassador atmsar11.fw

Looks like we forgot to update WHENCE when we converted this driver.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

WHENCE

@@ -8,6 +8,24 @@ kernel.
 
 --------------------------------------------------------------------------
 
+Driver: ambassador -- Madge Ambassador (Collage PCI 155 Server) ATM NIC.
+
+File: firmware/atmsar11.fw
+
+Licence: Allegedly GPLv2+, but no source visible. Marked:
+
+  Madge Ambassador ATM Adapter microcode.
+  Copyright (C) 1995-1999  Madge Networks Ltd.
+
+  This microcode data is placed under the terms of the GNU General
+  Public License. The GPL is contained in /usr/doc/copyright/GPL on a
+  Debian system and in the file COPYING in the Linux kernel source.
+
+  We would prefer you not to distribute modified versions without
+  consultation and not to ask for assembly/other microcode source.
+
+--------------------------------------------------------------------------
+
 Driver: korg1212 -- Korg 1212 IO audio device
 
 File: korg/k1212.dsp