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: Colin Ian King <[e-mail]>
Signed-off-by: Alexandre Belloni <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

drivers/rtc/rtc-v3020.c

···
 {
 	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);