net: stmmac: use queue rather than ->queue_index

net: stmmac: use queue rather than ->queue_index

We use a lot of ->queue_index where we already have the queue / channel
index (which are actually the same index), which has been used to get
the queue struct. Since queue and queue_index are identical in
priv->(tx|rx)_queue[queue]->queue_index there is no point using the
queue_index where we already have queue.

Use queue rather than queue_index.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://patch.msgid.link/E1w1LWy-0000000DGT8-2Hoc@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>