Merge branch 'tools-ynl-gen-print-setters-for-multi-val-attrs'

Jakub Kicinski says:

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tools: ynl-gen: print setters for multi-val attrs

ncdevmem seems to manually prepare the queue attributes.
This is not ideal, YNL should be providing helpers for this.
Make YNL output allocation and setter helpers for multi-val attrs.

v1: https://lore.kernel.org/20250722161927.3489203-1-kuba@kernel.org
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Link: https://patch.msgid.link/20250723171046.4027470-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>