Revert "mdss_samsung_oled_cmd_hd_wqhd_panel.c: add powersuspend hooks"

This reverts commit 19cc8c2a6247f5a19f72fb2d9f78356bf734ccab.
Revert "Voltage Control: fix minor code derp"

This reverts commit 4b206d2c9c0fdd3420edfe93bff17b9b5f7482b7.
Revert "cpu: add voltage control"

This reverts commit 64a406c6c5124d4037550da9a2ebc1852dcfab59.