drm/i915/cx0: Get encoder configuration for C10 and C20 PHY PLLs

drm/i915/cx0: Get encoder configuration for C10 and C20 PHY PLLs

For DDI initialization get encoder configuration for C10 and C20
chips.

v2: Get configuration either for a C10 or on the PTL port B
    eDP on TypeC PHY case for a C20 PHY PLL. Hence refer to this
    case as "non_tc_phy" instead of "c10phy".

Signed-off-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://lore.kernel.org/r/20251117104602.2363671-31-mika.kahola@intel.com