gpio: tegra186: Add Tegra234 hte support

To enable timestamp support for the Tegra234, has_gte variable needs
to be set true.

Signed-off-by: Dipen Patel <dipenp@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>