net: ethernet: ti: am65_cpsw: fix tx_cleanup for XDP case

For XDP transmit case, swdata doesn't contain SKB but the
XDP Frame. Infer the correct swdata based on buffer type
and return the XDP Frame for XDP transmit case.

Signed-off-by: Roger Quadros <rogerq@kernel.org>
Fixes: 8acacc40 ("net: ethernet: ti: am65-cpsw: Add minimal XDP support")
Link: https://patch.msgid.link/20250210-am65-cpsw-xdp-fixes-v1-3-ec6b1f7f1aca@kernel.org


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