Merge branch 'net-ethtool-support-including-flow-label-in-the-flow-hash-for-rss'

Jakub Kicinski says:

====================
net: ethtool: support including Flow Label in the flow hash for RSS

Add support for using IPv6 Flow Label in Rx hash computation
and therefore RSS queue selection.

v3: https://lore.kernel.org/20250724015101.186608-1-kuba@kernel.org
v2:  https://lore.kernel.org/20250722014915.3365370-1-kuba@kernel.org
RFC: https://lore.kernel.org/20250609173442.1745856-1-kuba@kernel.org
====================

Link: https://patch.msgid.link/20250811234212.580748-1-kuba@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>