Use the TMDS maximum frequency to check mode dot clock

[Damien Lespiau]

This series was written to make the X server not prune 4k modes on HDMI. The
HDMI CEA vendor specific data block has a max TMDS clock field that can be used
to check dot clocks against.

This series is quite possibly useful to not prune non-4k modes with clocks
above what the range section is advertizing.

https://bugs.freedesktop.org/show_bug.cgi?id=67030

-- 
Damien