The enumerator values for various GPU compute platforms were
added starting with OIDN 2.0, with the Metal GPU type added
in OIDN 2.2.
This is an alternative fix to ebb781675dd, which does not lead to
unhandled cases in switch statement, and follows the configuration
of OIDN and not Cycles (as OIDN might report devices which are
disabled in local Cycles build).
Pull Request: https://projects.blender.org/blender/blender/pulls/119155
032a24d8ac