Update arm64-intrinsics.md to include intrin.h mention

[janisozaur]

Some intrinsics, such as __prefetch come from intrin.h header file.

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[Court72]

@sigatrev

Can you review the proposed changes?

When the changes are ready for publication, add a #sign-off comment to signal that the PR is ready for the review team to merge.

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[sigatrev]

This change implies that some neon intrinsics are included through intrin.h which is not correct. The intrinsics listed explicitly on that page are the intrinsics that are not neon.

I do agree that we should mention the header to include for those intrinsics, but probably with a note under the ARM64-specific intrinsics listing header, rather than under the Neon header.

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Learn Build status updates of commit 45db299:

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[learn-build-service-prod]

Learn Build status updates of commit 2733260:

✅ Validation status: passed

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[TylerMSFT]

@sigatrev - I updated per your feedback.

[TylerMSFT]

#sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @sigatrev

[sigatrev]

LGTM. Thanks @TylerMSFT

[TylerMSFT]

#sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @sigatrev

[TylerMSFT]

#sign-off

[prmerger-automator]

Invalid command: '#sign-off'. Only the assigned author of one or more file in this PR can sign off. @sigatrev

[janisozaur]

Thanks for getting this merged, hopefully more software gets ported to neon