uboot-imx

MLK-15324-3 imx8: Add LVDS and DC setup common functions

Add common functions for LVDS/DC setup, video framebuffer init/disable,
LVDS to HDMI card settings, etc. Refactor it from video_imxdpuv1.c.
1. Add power, clocks, PLL relevant setup for LVDS and DC.
2. Configure the LVDS and its PHY settings for the display format and pixel link.
3. Setup the LVDS to HDMI card.
4. Implement the video_hw_init by calling DC driver API to output data to
   specified display panel.

Signed-off-by: Oliver Brown <oliver.brown@nxp.com>
Signed-off-by: Ye Li <ye.li@nxp.com>
(cherry picked from commit 9317f7ea4d976335a633f7056bbac1f77b01247a)
(cherry picked from commit 11dddc05ba174a4a31810efc0b860d24d385de97)