dt-bindings: gpio: lsi,zevio-gpio: convert to dtschema

dt-bindings: gpio: lsi,zevio-gpio: convert to dtschema

Convert Zevio GPIO Controller from text to dtschema.
Adding `interrupts` property fixes the following warning:
linux/out/arch/arm/boot/dts/nspire/nspire-tp.dtb: gpio@90000000:
'interrupts' does not match any of the regexes: 'pinctrl-[0-9]+'`
while executing `make dtbs_check` on Texas Instruments
nspire boards.

Signed-off-by: Pratik Farkase <pratik.farkase@wsisweden.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20240522151616.27397-1-pratik.farkase@wsisweden.com
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>