drm/i915/display: UHBR rates for Thunderbolt

drm/i915/display: UHBR rates for Thunderbolt

tbt-alt mode is missing uhbr rates 10G and 20G. This requires
requires pll clock rates 312.5 MHz and 625 MHz to be added,
respectively. The uhbr rates are supported only form PTL+
platforms.

v2: Add drm_WARN_ON() to check if port clock is not supported by
    the platform (Imre)
    Combine forward ungate with mask parameter (Imre)
    Rename XE3LPDP_* to XE3D_* (Imre)

Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241217143440.572308-1-mika.kahola@intel.com