QuarkSE has lp_count width set to 16 bits. Update the compiler to
consider it.

gcc/
2018-06-12  Claudiu Zissulescu  <claziss@synopsys.com>

	* config/arc/arc-arch.h (arc_extras): New enum.
	(arc_cpu_t):Add field extra.
	(arc_cpu_types): Consider the extras.
	* config/arc/arc-cpus.def: Add extras info.
	* config/arc/arc-opts.h (processor_type): Consider extra field.
	* config/arc/arc.c (arc_override_options): Handle extra field.

From-SVN: r261496