rtc: s35390a: Remove the unneeded result variable

Return the value s35390a_set_reg() directly instead of storing it in
another redundant variable.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Link: https://lore.kernel.org/r/20220905090119.335121-1-ye.xingchen@zte.com.cn
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

drivers/rtc/rtc-s35390a.c

@@ -211,7 +211,7 @@ static int s35390a_rtc_set_time(struct device *dev, struct rtc_time *tm)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	struct s35390a	*s35390a = i2c_get_clientdata(client);
-	int i, err;
+	int i;
 	char buf[7], status;
 
 	dev_dbg(&client->dev, "%s: tm is secs=%d, mins=%d, hours=%d mday=%d, "
@@ -234,9 +234,7 @@ static int s35390a_rtc_set_time(struct device *dev, struct rtc_time *tm)
 	for (i = 0; i < 7; ++i)
 		buf[i] = bitrev8(buf[i]);
 
-	err = s35390a_set_reg(s35390a, S35390A_CMD_TIME1, buf, sizeof(buf));
-
-	return err;
+	return s35390a_set_reg(s35390a, S35390A_CMD_TIME1, buf, sizeof(buf));
 }
 
 static int s35390a_rtc_read_time(struct device *dev, struct rtc_time *tm)