Hi Markus,
this patch replaces most of the current_gdbarch's found in *mips*.
These replacements are mostly mechanical changes. Unfortunately I dont
have access to MIPS (linux, bsd, remote) machines. This patch is
hence only "tested" by building GDB with --enable-targets=all.
I finally checked out the results of the testing on mips-irix, and
they came out OK. Beware that this only takes care of testing the
changes inside mips-tdep.c and even so the results on this platform
are not stellar. Nonetheless, it's nice to see that it didn't reveal
any new visible regression! :-)