Merge branch 'net-xsk-update-tx-queue-consumer'

Jason Xing says:

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net: xsk: update tx queue consumer

Patch 1 makes sure the consumer is updated at the end of generic xmit.
Patch 2 adds corresponding test.
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Link: https://patch.msgid.link/20250703141712.33190-1-kerneljasonxing@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>