pinctrl: tegra: Add descriptions for SoC data fields

Add detailed descriptions for the remaining fields in the
tegra_pinctrl_soc_data structure. This improves code documentation
and clarifies the purpose of each field, particularly for the
pin-specific configuration options.

Signed-off-by: Prathamesh Shete <pshete@nvidia.com>
Link: https://lore.kernel.org/20250305104939.15168-1-pshete@nvidia.com


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