Merge branch 'cpsw-emac-skb_put_padto'

Grygorii Strashko says:

====================
net: ethernet: ti: cpsw/emac: switch to use skb_put_padto()

Now frame padding in TI TI CPSW/EMAC is implemented in a bit of entangled way as
frame SKB padded in drivers (without skb->len) while frame length fixed in CPDMA.
Things became even more confusing hence CPSW switcdev driver need to perform min
TX frame length correction in switch mode [1].

To avoid further confusion, make xmit path more clear and linear, and avoid
updating CPDMA configuration interface for min TX frame length correction
(which is not CPDMA job in general) this series switches TI CPSW/EMAC
drivers to skb_put_padto() instead of skb_padto() in their xmit path, so
skb->len also got updated properly and then removes TX frame length
fixup from CPDMA code.

[1] https://patchwork.kernel.org/project/netdevbpf/patch/20210611132732.10690-1-grygorii.strashko@ti.com/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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