Split tls-macros.h into sysdeps directories

[David Miller]

From: "Joseph S. Myers" <joseph@codesourcery.com>
Date: Tue, 10 Jul 2012 23:51:37 +0000

> This patch splits the architecture-specific content of
> elf/tls-macros.h into separate files for each architecture in
> appropriate sysdeps directories, in line with the goal of reducing the
> number of architecture conditionals in common code and making libc
> targets more like ports targets in terms of having everything
> architecture-specific cleanly contained in sysdeps directories.
> 
> Tested x86_64 and x86.  Could architecture maintainers test / review
> for the other architectures?  Given the presence of a common macro
> used for both powerpc32 and powerpc64, I put both powerpc32 and
> powerpc64 versions in a single file in sysdeps, but powerpc
> maintainers may wish to split things up further.

Sparc is fine.