pinctrl: tegra210: Add Tegra210 pinctrl pm ops

This patch adds suspend and resume functionality to Tegra210 pinctrl.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1564607463-28802-3-git-send-email-skomatineni@nvidia.com


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