Change mips_opcodes from const array to a pointer,
and change bfd_mips_num_opcodes from const int to int,
so that we can increase the size of the mips opcodes table
dynamically.
Added INSN_COND_BRANCH_LIKELY, INSN_ISA2 and INSN_ISA3. Split
INSN_LOAD_DELAY into INSN_LOAD_MEMORY_DELAY and
INSN_LOAD_COPROC_DELAY. Split INSN_COPROC_DELAY into
INSN_COPROC_MOVE_DELAY and INSN_COPROC_MEMORY_DELAY.
(M_*): Added new values for r6000 and r4000 macros.
(ANY_DELAY): Removed.