Merge branch 'xsk-fix-negative-overflow-issues-in-zerocopy-xmit'

Jason Xing says:

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xsk: fix negative overflow issues in zerocopy xmit

Fix two negative overflow issues around {stmmac_xdp|igb}_xmit_zc().
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Link: https://patch.msgid.link/20250723142327.85187-1-kerneljasonxing@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>