drm: Verify gamma/degamma LUT size
While we want to potentially support multiple different gamma/degamma LUT sizes we can (and should) at least check that the blob length is a multiple of the LUT entry size. v2: s/expected_size_mod/expected_elem_size/ (Daniel) Add kernel doc (Daniel) v3: s/we/were/ typo in the docs 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/20180315152241.7113-1-ville.syrjala@linux.intel.com
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