Add modified Startek panel driver

-Remove syscon DSI references in mtk_dsi.c
-Register backlight using DT
-Clean up panel enable/disable functions
-Change timing structs to be more similar to other MTK panel drivers
-Changes in DT also include focaltech touchscreen

Change-Id: I163113da7ef5ffdcb1c2af024da263b2c26fe295
5 files changed