drm/i915/dp: add HAS_DP20 macro

Let's abstract the DP 2.0 feature. Initially just DG2.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/3746e700641bc17eff270569387fe869707d92ed.1631191763.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula 2021-09-09 15:52:02 +03:00
commit 1d71391724