* mips.igen (mips32r2, mips64r2): New ISA models. Add new model
tags to all instructions which are applicable to the new ISAs.
(do_ror, do_dror, ROR, RORV, DROR, DROR32, DRORV): Add, moved from
vr.igen.
* mips3264r2.igen: New file for MIPS 32/64 revision 2 specific
instructions.
* vr.igen (do_ror, do_dror, ROR, RORV, DROR, DROR32, DRORV): Move
to mips.igen.
* configure.ac (mipsisa32r2*-*-*, mipsisa64r2*-*-*): Add new targets.
* configure: Regenerate.