Upload to kernel.org is of the tar file with accompanying signature.

I used to sign the .gz files with my old DSA key, but now will only be
signing the raw tar files with my kernel.org upload key.

Signed-off-by: Andrew G Morgan <morgan@kernel.org>
Fix up the uapi/linux include scheme.

In adopting this uapi header file (without kernel internals), I previously
messed up on the apparent location of the files. Thanks to Tom Gundersen for
the clarification. Also, delete the non-uapi copies of things since they
are no longer needed to build the library and tools.

Signed-off-by: Andrew G Morgan <morgan@kernel.org>