Return the modifier's score, which indicates the driver's preference for the
modifier relative to others. A higher score is better. Zero means
unsupported.
Intended to assist selection of a modifier from an externally provided list,
such as VkImageDrmFormatModifierListCreateInfoEXT.
v2:
- Rename anv_drm_format_mod_score to isl_drm_modifier_get_score.
- Squash all incremental changes to anv_drm_format_mod_score.
v3:
- Drop redundant 'unlikely'. (for nchery)
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> (v2)
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net> (v3)
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