[PATCH V2 4/4] soc/tegra: pmc: Make configuration of IO pads in atomic context

The IO pad voltage configuration can be done in the regulator notifier callback which is atomic in nature. Replace the mutex with spin lock for the locking mechanism. Signed-off-by: Laxman Dewangan --- Changes from V1: New in series based on pinctrl driver requirement.

[PATCH V2 4/4] soc/tegra: pmc: Make configuration of IO pads in atomic context

The IO pad voltage configuration can be done in the regulator notifier callback which is atomic in nature. Replace the mutex with spin lock for the locking mechanism. Signed-off-by: Laxman Dewangan --- Changes from V1: New in series based on pinctrl driver requirement. ---