[stdlib] Add gfx1030 RX 6900 support

[farnoy]

No description provided.

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[farnoy]

I have read the CLA Document and I hereby sign the CLA

[JoeLoser]

LGTM, can you please also add a changelog entry here? Happy to sync and land this after that is done. Thanks!

Do all of the stdlib/kernel tests pass on your RX 6900?

[farnoy]

Should be clean now. No, not all of the tests pass, I think far from it but I haven't used this one in a while. I swapped to a radeon VII which is closer to the CDNA uarch which has better support and lets me develop other features there.

[JoeLoser]

!sync

[modularbot]

✅🟣 This contribution has been merged 🟣✅

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[BradLarson]

@farnoy - Very cool, thanks! I know all the stdlib tests didn't pass, but did you see any of the GPU function examples in Mojo work on this GPU? I wasn't entirely sure that RDNA2 ROCm would work, could only test on RDNA3 devices. I can also have other folks with similar RDNA2 GPUs test this out, now that it's in the nightlies.

[modularbot]

Landed in bd780fb! Thank you for your contribution 🎉