rtc: rv3028: remove useless warning messages

Remove voltage low messages as userspace has a proper way to get the
information and react on it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210126221435.2152339-2-alexandre.belloni@bootlin.com

drivers/rtc/rtc-rv3028.c

@@ -265,9 +265,6 @@ static irqreturn_t rv3028_handle_irq(int irq, void *dev_id)
 		return IRQ_NONE;
 	}
 
-	if (status & RV3028_STATUS_PORF)
-		dev_warn(&rv3028->rtc->dev, "Voltage low, data loss detected.\n");
-
 	status &= ~RV3028_STATUS_PORF;
 
 	if (status & RV3028_STATUS_TF) {
@@ -313,10 +310,8 @@ static int rv3028_get_time(struct device *dev, struct rtc_time *tm)
 	if (ret < 0)
 		return ret;
 
-	if (status & RV3028_STATUS_PORF) {
-		dev_warn(dev, "Voltage low, data is invalid.\n");
+	if (status & RV3028_STATUS_PORF)
 		return -EINVAL;
-	}
 
 	ret = regmap_bulk_read(rv3028->regmap, RV3028_SEC, date, sizeof(date));
 	if (ret)
@@ -828,9 +823,6 @@ static int rv3028_probe(struct i2c_client *client)
 	if (ret < 0)
 		return ret;
 
-	if (status & RV3028_STATUS_PORF)
-		dev_warn(&client->dev, "Voltage low, data loss detected.\n");
-
 	if (status & RV3028_STATUS_AF)
 		dev_warn(&client->dev, "An alarm may have been missed.\n");