dt-binding: pinctrl: Add cypress,cy8c95x0

Added device tree binding documentation for
Cypress CY8C95x0 I2C pin-controller.

Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220816054917.7893-2-patrick.rudolph@9elements.com


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>