drm/i915/dp: Reuse intel_hdmi_tmds_clock()

Reuse intel_hdmi_tmds_clock() for DP->HDMI TMDS clock calculations.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211015133921.4609-9-ville.syrjala@linux.intel.com


Reviewed-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>