I guess I have found it.
commit 64fdf452a85718935d82416d141be144b262c542
Author: Stefano Babic <sbabic@denx.de>
Date: Wed Jan 20 18:19:32 2010 +0100
MX51: Add initial support for the Freescale MX51
The patch add initial support for the Freescale i.MX51 processor
(family arm cortex_a8).