This tree seems to be missing per board dt support so booting with a device tree doesn't seem to work. Need something like for example this commit that added it for panda in the 3.0 tree:
commit d24e9a194c2ed4ca56b8f4e7d96038cd3af3fda8 Author: Grant Likely grant.likely@linaro.org Date: Tue Jul 5 23:42:31 2011 -0600
arm/dt: Add Pandaboard devicetree support
Enable basic device tree support on Pandaboard
Signed-off-by: Grant Likely grant.likely@linaro.org