Merge tag 'video-2021-07-rc1' of https://source.denx.de/u-boot/custodians/u-boot...

 - rk3399 eDP support
 - pwm backlight without a known period_ns
 - add Chrome OS EC PWM driver
 - Kconfig SIMPLE_PANEL DM_GPIO dependency
 - remove mb862xx driver remnants
 - fix KiB format in reserve_video() debug trace
 - fix tegra124 sor CSTM LVDS_EN_ENABLE/DISABLE config
 - fix line padding calculation for 16 and 24 BPP bitmaps