arm-soc: Xilinx Zynq DT changes for v3.12

Hi Michal,

Michal Simek [off-list ref] writes:

Hi Arnd and Olof,

I'm now helping out with arm-soc maintenance as well, and am on the
arm at kernel.org alias, so thanks for Cc'ing it.

please pull this simple DT change to your tree.

Pulled into next/dt.

In the future, it makes things simpler for us if you base on older -rc
releases where possible (c.f. similar request by Olof[1].)  In this
case, it was trivial for me to rebase it onto -rc1 so I've done that
before applying.

Thanks,

Kevin

[1] http://lists.infradead.org/pipermail/linux-arm-kernel/2013-August/189115.html