[PATCH net] net: stmmac: Don't set or get RSS parameters when not supported

[Jakub Kicinski]

On Sat, 26 Sep 2026 11:33:41 +0200 Maxime Chevallier wrote:
> The RSS kselftests fail on stmmac, and this is partly due to the driver
> reporting bogus data for the RSS ops :
> 
>  - ethtool -x reports an indirection table and a key while the hardware
>    doesn't have any of that
>  - ethtool -X fails with -EINVAL.

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