net/sonic: Remove redundant next_tx variable
The eol_tx variable is the one that matters to the tx algorithm because packets are always placed at the end of the list. The next_tx variable just confuses things so remove it. Tested-by: Stan Johnson <userm57@yahoo.com> Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: David S. Miller <davem@davemloft.net>
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