leds: convert PCA9633 LED driver to devm_kzalloc()

Cc: Peter Meerwald <p.meerwald@bct-electronic.com>
Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
diff --git a/drivers/leds/leds-pca9633.c b/drivers/leds/leds-pca9633.c
index d8926fd..edcd706 100644
--- a/drivers/leds/leds-pca9633.c
+++ b/drivers/leds/leds-pca9633.c
@@ -108,7 +108,7 @@
 		}
 	}
 
-	pca9633 = kcalloc(4, sizeof(*pca9633), GFP_KERNEL);
+	pca9633 = devm_kzalloc(&client->dev, 4 * sizeof(*pca9633), GFP_KERNEL);
 	if (!pca9633)
 		return -ENOMEM;
 
@@ -156,8 +156,6 @@
 		cancel_work_sync(&pca9633[i].work);
 	}
 
-	kfree(pca9633);
-
 	return err;
 }
 
@@ -171,8 +169,6 @@
 		cancel_work_sync(&pca9633[i].work);
 	}
 
-	kfree(pca9633);
-
 	return 0;
 }