Define HAVE_KERNEL_NEON as (0) if not defined for simd_stat

[w0xel]

Motivation and Context

Currently does not build for aarch64 on linux >= 6.2, as HAVE_KERNEL_NEON will not be defined, but used in simd_stat.c.

Description

This adds the HAVE_KERNEL_NEON to simd_stat.c defaulted to 0 to make it build again.

How Has This Been Tested?

Built for aarch64 with latest master before, does not build with error: 'HAVE_KERNEL_NEON' undeclared.

Built for aarch64 again with this patch, does build again.

No other builds or tests were done.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Performance enhancement (non-breaking change which improves efficiency)
• Code cleanup (non-breaking change which makes code smaller or more readable)
• Breaking change (fix or feature that would cause existing functionality to change)
• Library ABI change (libzfs, libzfs_core, libnvpair, libuutil and libzfsbootenv)
• Documentation (a change to man pages or other documentation)

Checklist:

• My code follows the OpenZFS code style requirements.
• I have updated the documentation accordingly.
• I have read the contributing document.
• I have added tests to cover my changes.
• I have run the ZFS Test Suite with this change applied.
• All commit messages are properly formatted and contain Signed-off-by.

Signed-off-by: Sebastian Wuerl [email protected]

Requires-builders: style arch

[Harry-Chen]

LGTM, but please fix the checkstyle workflow by adding signed-off-by to your commit message.

[Harry-Chen]

I happened to see this comment: 1d84c9e#commitcomment-147049188

So we may need such guard for each macro used in simd_stat.c, since any of them could be undefined in different cases.