ARC: perf: Rename DT binding to not confuse with power mgmt

* ARC Performance Counters

The ARC700 can be configured with a pipeline performance monitor for counting

CPU and cache events like cache misses and hits. Like conventional PCT there

are 100+ hardware conditions dynamically mapped to upto 32 counters

Note that:

 * The ARC 700 PCT does not support interrupts; although HW events may be

   counted, the HW events themselves cannot serve as a trigger for a sample.

Required properties:

- compatible : should contain

	"snps,arc700-pct"

Example:

pmu {

        compatible = "snps,arc700-pct";

};

* ARC Performance Monitor Unit

The ARC 700 can be configured with a pipeline performance monitor for counting

CPU and cache events like cache misses and hits.

Note that:

 * ARC 700 refers to a family of ARC processor cores;

   - There is only one type of PMU available for the whole family;

   - The PMU may support different sets of events; supported events are probed

     at boot time, as required by the reference manual.

 * The ARC 700 PMU does not support interrupts; although HW events may be

   counted, the HW events themselves cannot serve as a trigger for a sample.

Required properties:

- compatible : should contain

	"snps,arc700-pmu"

Example:

pmu {

        compatible = "snps,arc700-pmu";

};

		};

		arcpmu0: pmu {

			compatible = "snps,arc700-pmu";

			compatible = "snps,arc700-pct";

		};

	};

};

#ifdef CONFIG_OF

static const struct of_device_id arc_pmu_match[] = {

	{ .compatible = "snps,arc700-pmu" },

	{ .compatible = "snps,arc700-pct" },

	{},

};

MODULE_DEVICE_TABLE(of, arc_pmu_match);

static struct platform_driver arc_pmu_driver = {

	.driver	= {

		.name		= "arc700-pmu",

		.name		= "arc700-pct",

		.of_match_table = of_match_ptr(arc_pmu_match),

	},

	.probe		= arc_pmu_device_probe,