Make all four mipsisa* simulators support mipsisa{32,64}{,r2}

[Thiemo Seufer]

Richard Sandiford wrote:
[snip]
> sim/mips/
> 	* configure.ac (sim_mipsisa3264_configs): New variable.
> 	(mipsis32*-*-, mipsisa32r2*-*-*, mips64*-*-*, mips64r2*-*-*): Make
> 	every configuration support all four targets, using the triplet to
> 	determine the default.
> 	* configure: Regenerate.

Ok.


Thiemo