dt-bindings: gpio: gpio-pca95xx: Add tcal6408 and tcal6416

dt-bindings: gpio: gpio-pca95xx: Add tcal6408 and tcal6416

TCAL6408 and TCAL6416 supports latchable inputs and maskable interrupt.
add compatibles ti,tcal6408 and ti,tcal6416

The TI variants has the same programming model as the NXP PCAL6408 and
PCAL6416, but supports other supply voltages.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Jan Remmet <j.remmet@phytec.de>
Link: https://lore.kernel.org/r/20251216-wip-jremmet-tcal6416rtw-v2-2-6516d98a9836@phytec.de
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>