dt-bindings: Fix array constraints on scalar properties

Scalar properties shouldn't have array constraints (minItems, maxItems,
items). These constraints can simply be dropped with any constraints under
'items' moved up a level.

Cc: Agathe Porte <agathe.porte@nokia.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: Jean Delvare <jdelvare@suse.com>
Cc: Krzysztof Kozlowski <krzk+dt@kernel.org>
Cc: Olivier Moysan <olivier.moysan@foss.st.com>
Cc: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Cc: Jonathan Cameron <jic23@kernel.org>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Philipp Zabel <p.zabel@pengutronix.de>
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Cc: Yunfei Dong <yunfei.dong@mediatek.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: linux-hwmon@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Cc: linux-iio@vger.kernel.org
Cc: linux-media@vger.kernel.org
Cc: linux-remoteproc@vger.kernel.org
Cc: linux-spi@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20220413140121.3132837-1-robh@kernel.org