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Convert drm_find_cea_extension() to a predicate function to check if the EDID has a CTA extension or a DisplayID CTA data block. This is mainly to avoid adding new users that only find the first CTA extension. 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> Link: https://patchwork.freedesktop.org/patch/msgid/a5bf228942e6bd0fc70d5cf7a14c249a14a7afcd.1651569697.git.jani.nikula@intel.com