Revert "tegra: dvfs: add extra slot for CPU_DVFS to accomodate 15 slot TEGRA_OC range"

This reverts commit e3e629c2ad932489d19d361859947a1f6a39b1d2.
Revert "tegra: dvfs: core|speedo/aon +25mv over cpu and adjust DVFS (for TEGRA_OC)"

This reverts commit 21851c87c25b53d9eea8d2afb8a3bf079ea03abd.
tegra: dvfs: adjust voltages