rtc: v3020: remove redundant initialization of variable retval

The variable retval is being initialized with a value that is never read,
it is being updated later on. The assignment is redundant and can be
removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210609120050.185746-1-colin.king@canonical.com

drivers/rtc/rtc-v3020.c

@@ -282,7 +282,7 @@ static int rtc_probe(struct platform_device *pdev)
 {
 	struct v3020_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct v3020 *chip;
-	int retval = -EBUSY;
+	int retval;
 	int i;
 
 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);