drm/i915: Use graphics ver, rel info for media on old platforms

Platforms prior to MTL do not have a separate media and graphics version.
On platforms where GMD id is not supported, reuse the graphics ip version,
release info for media.

The rest of the IP graphics, display versions would be copied during driver
creation.

While at it warn if GMD is not used for platforms greater than gen12.

v2:
 - Use simple assignment to copy contents of the structure(JaniN)

Fixes: c2c7075225ef ("drm/i915: Read graphics/media/display arch version from hw")
Cc: Jani Nikula <[email protected]>
Cc: Lucas De Marchi <[email protected]>
Cc: Matt Roper <[email protected]>
Cc: Ville Syrjälä <[email protected]>
Signed-off-by: Radhakrishna Sripada <[email protected]>
Reviewed-by: Lucas De Marchi <[email protected]>
Signed-off-by: Lucas De Marchi <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]

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