drm/dp: add 128b/132b link status helpers from DP 2.0 E11
The DP 2.0 errata redefines link training. There are some new status bits, and some of the old ones need to be checked independently. Add helpers to do this. Cc: Uma Shankar <uma.shankar@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by:Jani Nikula <jani.nikula@intel.com> Reviewed-by:
Ville Syrjälä <ville.syrjala@linux.intel.com> Acked-by:
Thomas Zimmermann <tzimmermann@suse.de> Link: https://patchwork.freedesktop.org/patch/msgid/5a46260d1f171fed46d0ab8fe4b6499abd65ce24.1643878928.git.jani.nikula@intel.com
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