drm/i915/sdvo: Pick the TV dotclock from adjusted_mode

port_clock is what the encoder/dpll code is supposed to calculate,
it is not the input clock. Use the dotclock as the target we're
trying to achieve instead.

TODO: the SDVO TV clocking is a mess atm and needs further work

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230705202122.17915-7-ville.syrjala@linux.intel.com


Acked-by: Jani Nikula <jani.nikula@intel.com>