fd6c5525957b drm/i915/dp: Enable Common SDP Transmission line
5efb30d81215 drm/i915/dp: Introduce helpers to enable/disable CMN SDP Transmission line
b913c8023126 drm/i915/dp: Add helper for AS SDP TL and fix documentation
a1dc900c6ff1 drm/i915/dp: Add fields to store CMN_SDP_TL register state in crtc_state
3978d919eef0 drm/i915/nvl: Add register definitions for common SDP Transmission Line