[Patch][binutils][arm] Create a new generic coprocessor array [3/10]

Hi,

This patch is part of a series that adds support for Armv8.6-A
(Matrix Multiply and BFloat16 extensions) to binutils.

Some generic instructions match a large range of encoding space (e.g.
stc, mcr, mrc).
Currently these instructions are in the coprocessor_opcodes array, which
means they are checked before many other instructions when disassembling
arm and thumb32 codes.

This patch moves the generic instructions into a separate array to be
checked later on.
This is done in order to avoid instruction conflict between the generic
instructions and newer ones -- this has already been seen with MVE, and
is also a problem with BFloat16.

One way to avoid the conflict could be to swap the search order between
coprocessor_opcodes and neon_opcodes.
We avoid this since it's a larger change that may introduce extra bugs
(that aren't caught by the testsuite).

We have decided against searching the generic array after searching the
arm specific and thumb32 specific arrays with a similar reasoning about
keeping the change small.

Regression tested with arm-none-linux-gnueabihf.

Committed on behalf of Mihail Ionescu.

opcodes/ChangeLog:

2019-10-29  Mihail Ionescu  <mihail.ionescu@arm.com>
2019-10-29  Matthew Malcomson  <matthew.malcomson@arm.com>

	* arm-dis.c (print_insn_coprocessor,
	print_insn_generic_coprocessor): Create wrapper functions around
	the implementation of the print_insn_coprocessor control codes.
	(print_insn_coprocessor_1): Original print_insn_coprocessor
	function that now takes which array to look at as an argument.
	(print_insn_arm): Use both print_insn_coprocessor and
	print_insn_generic_coprocessor.
	(print_insn_thumb32): As above.

Is it ok for trunk?

Regards,
Mihail

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