Merge dtc

[Paul Mackerras]

David Woodhouse writes:

> I think this is a bad idea -- it's hardly a difficult for those people
> who _do_ need dts to obtain it separately.

The trouble is that it's not just people who are making a kernel for a
specific embedded board that need dtc.  These days anyone who wants to
try cross-compiling a powerpc kernel and does a make allyesconfig, or
who picks cell_defconfig or ps3_defconfig to try, needs dtc if their
kernel build is to go all the way through and give them an exit status
of 0.  I can see that for people who are trying to do the right thing
and compile-test their patch across architectures, it's annoying that
powerpc has an extra external requirement when no other architecture
does, and it usually just means they don't compile-test on powerpc.

Of the various options for solving this, including dtc in the kernel
sources seems best to me.

Paul.