[PATCH] Fix and extend features of .cpu directive.

[Nick Clifton]

Hi Claudiu,

> gas/
> 2016-11-17  Claudiu Zissulescu  <claziss@synopsys.com>
> 
> 	* testsuite/gas/arc/cl-warn.s: New file.
> 	* testsuite/gas/arc/cpu-pseudop-1.d: Likewise.
> 	* testsuite/gas/arc/cpu-pseudop-1.s: Likewise.
> 	* testsuite/gas/arc/cpu-pseudop-2.d: Likewise.
> 	* testsuite/gas/arc/cpu-pseudop-2.s: Likewise.
> 	* testsuite/gas/arc/cpu-warn2.s: Likewise.
> 	* config/tc-arc.c (selected_cpu): Initialize.
> 	(feature_type): New struct.
> 	(feature_list): New variable.
> 	(arc_check_feature): New function.
> 	(arc_select_cpu): Check for .cpu duplicates. Don't overwrite the
> 	current cpu features. Check if a feature is available for a given
> 	cpu.
> 	(md_parse_option): Test if features are available for a given cpu.

Approved - please apply.

Cheers
  Nick