Update documentation for new parameter "zfs_qat_disable".

[wli5]

Update documentation in zfs-module-parameters.5 for new parameter "zfs_qat_disable" which was introduced by #5846.

Description

The changes are in man/man5/zfs-module-parameters.5.

Motivation and Context

New parameter was introduced in PR #5846, and need to be added in documentation.

How Has This Been Tested?

Build the documentation, check the new parameter.

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)

Checklist:

• My code follows the ZFS on Linux code style requirements.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.
• Change has been approved by a ZFS on Linux member.

[mention-bot]

@wli5, thanks for your PR! By analyzing the history of the files in this pull request, we identified @FransUrbo, @DeHackEd and @ahrens to be potential reviewers.

[DeHackEd]

Since the module parameter is only available when QAT drivers are present, I suggest mentioning that.

[wli5]

@DeHackEd I added it, thanks!