Revert "mako: backlight: used lower brightness on autobrightness setting"

This reverts commit 5d5db9ee2f407c8db45b67cf9c1ab927c728dd01.
Revert "mako: backlight: apply customized backlight LUT for power saving"

This reverts commit 22fada9dfd7ad1e26f85650dfc07992206b80319.