More arm-dis.c cleanups

[Nick Clifton]

Hi Zack,

> Tested on arm-elf; OK to apply?

Please could you test on a COFF and PE based ARM ports as well, just to 
make sure.

When you tested did you run the GAS testsuites ?  If not, please do so 
(for all three targets).

After that then...

>         * opcodes/arm-opc.h: Delete; fold contents into ...
>         * opcodes/arm-dis.c: ... here.
>         Move includes of internal COFF headers next to includes of
>         internal ELF headers.
>         (streq, WORD_ADDRESS, BDISP, BDISP23): Delete, unused.
>         (struct arm_opcode): Rename struct opcode32.  Make 'assembler' const.
>         (struct thumb_opcode): Rename struct opcode16.  Make 'assembler' const.
>         (arm_conditional, arm_fp_const, arm_shift, arm_regname, regnames)
>         (iwmmxt_wwnames, iwmmxt_wwssnames):
>         Make const.
>         (regnames): Remove iWMMXt coprocessor register sets.
>         (iwmmxt_regnames, iwmmxt_cregnames): New statics.
>         (get_arm_regnames): Adjust fourth argument to match above changes.
>         (set_iwmmxt_regnames): Delete.
>         (print_insn_arm): Constify 'c'.  Use ISO syntax for function
>         pointer calls.  Expand sole use of BDISP.  Use iwmmxt_regnames
>         and iwmmxt_cregnames, not set_iwmmxt_regnames.
>         (print_insn_thumb16, print_insn_thumb32): Constify 'c'.  Use
>         ISO syntax for function pointer calls.
> 
>         * include/dis-asm.h (get_arm_regnames): Update prototype.

Approved - please apply.  (And thanks for doing this tidy up).

Cheers
   Nick