regulator: pv88090: Fix irq leak

Use devm_request_threaded_irq to ensure the irq is freed when unload the
module.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>

drivers/regulator/pv88090-regulator.c

@@ -357,7 +357,7 @@ static int pv88090_i2c_probe(struct i2c_client *i2c,
 			return ret;
 		}
 
-		ret = request_threaded_irq(i2c->irq, NULL,
+		ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL,
 					pv88090_irq_handler,
 					IRQF_TRIGGER_LOW|IRQF_ONESHOT,
 					"pv88090", chip);