rtc: pic32: convert to devm_rtc_allocate_device

This allows further improvement of the driver.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
diff --git a/drivers/rtc/rtc-pic32.c b/drivers/rtc/rtc-pic32.c
index d7ef0a6..43bd701 100644
--- a/drivers/rtc/rtc-pic32.c
+++ b/drivers/rtc/rtc-pic32.c
@@ -348,13 +348,15 @@
 
 	device_init_wakeup(&pdev->dev, 1);
 
-	pdata->rtc = devm_rtc_device_register(&pdev->dev, pdev->name,
-						 &pic32_rtcops,
-						 THIS_MODULE);
-	if (IS_ERR(pdata->rtc)) {
-		ret = PTR_ERR(pdata->rtc);
+	pdata->rtc = devm_rtc_allocate_device(&pdev->dev);
+	if (IS_ERR(pdata->rtc))
+		return PTR_ERR(pdata->rtc);
+
+	pdata->rtc->ops = &pic32_rtcops;
+
+	ret = rtc_register_device(pdata->rtc);
+	if (ret)
 		goto err_nortc;
-	}
 
 	pdata->rtc->max_user_freq = 128;