perf/arm_pmu_platform: fix tests for platform_get_irq() failure

The platform_get_irq() returns negative error codes.  It can't actually
return zero.
Signed-off-by: NYu Zhe <yuzhe@nfschina.com>
Link: https://lore.kernel.org/r/20220825011844.8536-1-yuzhe@nfschina.comSigned-off-by: NWill Deacon <will@kernel.org>

drivers/perf/arm_pmu_platform.c

@@ -117,7 +117,7 @@ static int pmu_parse_irqs(struct arm_pmu *pmu)
 
 	if (num_irqs == 1) {
 		int irq = platform_get_irq(pdev, 0);
-		if (irq && irq_is_percpu_devid(irq))
+		if ((irq > 0) && irq_is_percpu_devid(irq))
 			return pmu_parse_percpu_irq(pmu, irq);
 	}