Deprecate debugfs GPU IP block version labels in NFD hook doc

There's no mapping available from IP block versions to actual product
features, which make these version numbers fairly useless for end
users.

In mixed GPU clusters, running a job that adds/updates node labels for
the relevant GPU features to each relevant node would be much more
user-friendly.  This could be done easily by converting given GPU API
capability tool (e.g. "vainfo" for VA-API, "clinfo" for OpenCL) output
to a NFD feature file.

(Such thing would be outside of this project scope though, except
maybe as an example / test-case.)

Signed-off-by: Eero Tamminen <eero.t.tamminen@intel.com>

Author: eero-t

cmd/gpu_nfdhook/README.md

@@ -81,8 +81,8 @@ Depending on your kernel driver, running the NFD hook as root may introduce foll
 name | type | description|
 -----|------|------|
 |`gpu.intel.com/platform_gen`| string | GPU platform generation name, typically an integer. Deprecated.
-|`gpu.intel.com/media_version`| string | GPU platform Media pipeline generation name, typically a number.
-|`gpu.intel.com/graphics_version`| string | GPU platform graphics/compute pipeline generation name, typically a number.
+|`gpu.intel.com/media_version`| string | GPU platform Media pipeline generation name, typically a number. Deprecated.
+|`gpu.intel.com/graphics_version`| string | GPU platform graphics/compute pipeline generation name, typically a number. Deprecated.
 |`gpu.intel.com/platform_<PLATFORM_NAME>.count`| number | GPU count for the named platform.
 |`gpu.intel.com/platform_<PLATFORM_NAME>.tiles`| number | GPU tile count in the GPUs of the named platform.
 |`gpu.intel.com/platform_<PLATFORM_NAME>.present`| string | "true" for indicating the presense of the GPU platform.