With the I/O rework for hd64461 we're down to a single header,
so move it by itself and get rid of the directory.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>

Signed-off-by: NDavid Woodhouse <dwmw2@infradead.org>

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!