Add mcTVM MACA lib64 discovery

[ghangz]

Summary

• This change improves FindMACA.cmake library discovery so mcTVM can find MACA lib64 layouts reliably in MetaX compilation containers.
• The change is limited to MACA build discovery or guarded setup logic and keeps existing default behavior compatible.
• Main files: cmake/utils/FindMACA.cmake

Validation

• Verified on Gitee.AI MetaX GPU resources in the mcTVM TileLang/MACA TVM build batch, 6/6 PASS.
• Branch validation command: CMake configure and mxcc compile smoke validation in the MACA TVM build image.
• Pull request text is ASCII-only to avoid encoding issues on web forms and API clients.

Review notes

• Source branch: ghangz:mengz/mctvm-find-maca-lib64
• Target branch: MetaX-MACA/mcTVM:dev
• Maintainers can modify this branch if follow-up adjustments are needed.

[gemini-code-assist]

Code Review

This pull request updates the MACA library search logic in FindMACA.cmake to look into multiple library paths (lib, lib64, and lib/x86_64-linux-gnu) and adds additional status messages. The review feedback recommends wrapping the library paths and message variable expansions in double quotes to ensure robustness when paths contain spaces.

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[gemini-code-assist]

When defining list variables containing paths, it is important to wrap each path in double quotes. If ${__maca_sdk} contains spaces, the unquoted paths will be split into multiple list elements incorrectly, which can cause find_library to fail.

    set(__maca_library_paths
      "${__maca_sdk}/lib"
      "${__maca_sdk}/lib64"
      "${__maca_sdk}/lib/x86_64-linux-gnu"
    )

[gemini-code-assist]

To prevent issues when ${__maca_sdk} contains spaces (which would cause CMake to split it into multiple arguments and concatenate them without spaces in the output), it is safer and more idiomatic to wrap the variable expansion inside the double-quoted string.

    message(STATUS "Found MACA SDK=${__maca_sdk}")

[gemini-code-assist]

To prevent issues when ${MACA_HCA_LIBRARY} contains spaces, it is safer and more idiomatic to wrap the variable expansion inside the double-quoted string.

    message(STATUS "Found MACA_HCA_LIBRARY=${MACA_HCA_LIBRARY}")