Fix LVDS startup sequences in the R-Car DU driver...

Hello!

Here's the set of 2 patches against the 'drmf-ixes' branch of David Airlie's 'linux.git' repo plus the patch fixing LVDCR1 for R-Car gen3 posted recently. Documentation check against the recent manuals revealed that the LVDS startup sequences don't match those. I was able to test the gen3 patch on V3M, gen2 patch remained untested because the DU support on the Porter board is borked, hopefully Laurent can test the gen2 patch on Lager...

[1/2] drm: rcar-du: lvds: fix LVDS startup on R-Car gen3 [2/2] drm: rcar-du: lvds: fix LVDS startup on R-Car gen2

MBR, Sergei