Revert "Gamma value adjusted as my own liking"

This reverts commit b61013617f64ae5b4810ae61e10dbaf3acc1558f.
Revert "mako: Change display color calibration"

This reverts commit 38b16bcfe31aef241331725da64bff6880ff7b6a.
Revert "mako LCD: keep RGB custom colors alive after screen off/on"

This reverts commit 1757aaa2a9bf1c0da0af2b605045a901994e4d4f.