dt-bindings: iio: accel: bma255: Sort compatibles

Similar to recent rework in the bmc150-accel driver, sort the compatible
list in the DT schema so there is a consistent order.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210614163150.7774-3-stephan@gerhold.net


Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>