[Feature Request] Hexagon Backend with HMX Supports

Required prerequisites

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Motivation

Currently, Qualcomm has released the Hexagon Kernel Library (https://softwarecenter.qualcomm.com/catalog/item/Hexagon_KL), which provides interfaces for HMX instructions. There are currently many edge devices powered by Qualcomm chips, and specialized attention mechanisms like sparse attention are also well-suited for mobile devices. We can leverage tilelang's capabilities to achieve CodeGen for the Hexagon backend targeting custom attention implementations and other operators.

Solution

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Alternatives

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Additional context

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