[binutils-gdb] arc: Replace ARC_SHORT macro with arc_opcode_len function

[sergiodj+buildbot at sergiodj dot net]

*** TEST RESULTS FOR COMMIT 06fe285fd293e999481ec8f5c619658aa5e3b48b ***

Author: Graham Markall <graham.markall@embecosm.com>
Branch: master
Commit: 06fe285fd293e999481ec8f5c619658aa5e3b48b

arc: Replace ARC_SHORT macro with arc_opcode_len function

In preparation for moving to a world where arc instructions can be 2, 4,
6, or 8 bytes in length, replace the ARC_SHORT macro (which is either
true of false) with an arc_opcode_len function that returns a length in
bytes.

There should be no functional change after this commit.

gas/ChangeLog:

	* config/tc-arc.c (assemble_insn): Replace use of ARC_SHORT with
	arc_opcode_len.

include/ChangeLog:

	* opcode/arc.h (arc_opcode_len): Declare.
	(ARC_SHORT): Delete.

opcodes/ChangeLog:

	* arc-dis.c (find_format_from_table): Replace use of ARC_SHORT
	with arc_opcode_len.
	(find_format_long_instructions): Likewise.
	* arc-opc.c (arc_opcode_len): New function.