[rfc] [0/8] Eliminate current_gdbarch from *-tdep.c

["Ulrich Weigand" <uweigand at de dot ibm dot com>]

Hello,

the *-tdep.c files are already nearly free of references to current_gdbarch.
In fact, all remaining references are simple to remove; the following set of
straightforward patches achieves this.  (Note that some *implicit* references,
e.g. due to builtin_type_... use, still remain!)

Tested on powerpc-linux and powerpc64-linux, as well as by compiling 
everything with --enable-targets=all.

I don't expect this patch set to change the behaviour of GDB on any platform.
However, as I'm unable to test most of the archs touched by those patches,
I'd certainly appreciate feedback / testing.

If there are no objections, I'm planning to commit those in a week or so.

Bye,
Ulrich 

-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com