rtc: simplify the return expression of rx8025_set_offset()

Simplify the return expression.
Reported-by: NZeal Robot <zealci@zte.com.cn>
Signed-off-by: NMinghao Chi <chi.minghao@zte.com.cn>
Reviewed-by: NNobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220505022314.59822-1-chi.minghao@zte.com.cn

drivers/rtc/rtc-rx8025.c

@@ -436,7 +436,6 @@ static int rx8025_set_offset(struct device *dev, long offset)
 {
 	struct i2c_client *client = to_i2c_client(dev);
 	u8 digoff;
-	int err;
 
 	offset /= RX8025_ADJ_RESOLUTION;
 	if (offset > RX8025_ADJ_DATA_MAX)
@@ -449,11 +448,7 @@ static int rx8025_set_offset(struct device *dev, long offset)
 		offset += 128;
 	digoff = offset;
 
-	err = rx8025_write_reg(client, RX8025_REG_DIGOFF, digoff);
-	if (err)
-		return err;
-
-	return 0;
+	return rx8025_write_reg(client, RX8025_REG_DIGOFF, digoff);
 }
 
 static const struct rtc_class_ops rx8025_rtc_ops = {