tpm: Provide a TPM access library

[Jarkko Sakkinen]

On Tue, Aug 21, 2018 at 04:56:49PM +0100, David Howells wrote:
> 
> Hi Denis, Jarkko, James,
> 
> I managed to recover the TPM library patchset that I was working on about four
> years ago in the process of trying to write an asymmetric key subtype that
> could use the TPM.
> 
> Here it is in it's original glory for reference.  I ended up leaving it
> because Jarkko's tpm-2 stuff broke it and I had other things to work on.  If
> it's deemed worthwhile, I can try to forward port it to current Linus/mastet.
> 
> Note that one or two of the preliminary patches may be upstream.
> 
> The patches can also be found here:
> 
> 	http://git.kernel.org/cgit/linux/kernel/git/dhowells/linux-fs.git/log/?h=tpm-lib

Just a minor overal complaint: lower case for tags (please do not send
a newer version just because of that  before I have time to review this).
Thank you.

/Jarkko