drm: Introduce drm_color_lut_size()
Provide a small helper to convert the blob length in bytes to the number of LUT entries. v2: Add kerneldoc (Daniel) Cc: Daniel Vetter <daniel.vetter@ffwll.ch> Signed-off-by:Ville Syrjälä <ville.syrjala@linux.intel.com> Reviewed-by:
Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20180315152338.7248-1-ville.syrjala@linux.intel.com
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