mb/system76/mtl: Enable NPU

[crawfxrd]

The fuck did Intel add now?

TODO: Check if it's detected/works with the NPU driver or something.

Ref: system76/firmware-open#580

[leviport]

I tested this on darp10-b running Ubuntu 24.04, with the NPU driver for Linux and ran the npu-umd-test app mentioned in the documentation for the driver.

On currently released firmware, I get a quick fail and only a handful of lines of output:

[==========] Running 182 tests from 37 test suites.
[----------] Global test environment set-up.
/home/system76/linux-npu-driver/validation/umd-test/testenv.hpp:74: Failure
Expected equality of these values:
  zeInit(0)
    Which is: ZE_RESULT_ERROR_UNINITIALIZED (0x78000001)
  ZE_RESULT_SUCCESS
    Which is: ZE_RESULT_SUCCESS (0x0)

After installing this update, it still says the test fails overall, but many of the tests it runs say that they succeed. At the very least, it certainly looks like it's doing a whole lot more than it was before: darp10-b-npu-test-output.txt

This indicates to me that the NPU is now active and doing something, and I think that's good enough for now.