iio: magnetometer: yas530: Change range of data in volatile register

In function yas5xx_volatile_reg(), register "YAS5XX_MEASURE_DATA + 8" shouldn't
be volatile as we count from 0 to 7 here.

Instead of lowering the number from 8 to 7, the operator "<=" is replaced by
"<". The size of the measure data array is 8, therefore it's more natural to
use 8 as a constant.

This change is of low importance as the "+ 8" register isn't called.
Signed-off-by: Jakob Hauser <jahau@rocketmail.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/dabba10feb80171350525ac874f944076c46e084.1660337264.git.jahau@rocketmail.comSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/magnetometer/yamaha-yas530.c

@@ -527,7 +527,7 @@ static bool yas5xx_volatile_reg(struct device *dev, unsigned int reg)
 {
 	return reg == YAS5XX_ACTUATE_INIT_COIL ||
 		reg == YAS5XX_MEASURE ||
-		(reg >= YAS5XX_MEASURE_DATA && reg <= YAS5XX_MEASURE_DATA + 8);
+		(reg >= YAS5XX_MEASURE_DATA && reg < YAS5XX_MEASURE_DATA + 8);
 }
 
 /* TODO: enable regmap cache, using mark dirty and sync at runtime resume */