octeontx2-pf: AF_XDP: code clean up

The current API, otx2_xdp_sq_append_pkt, verifies the number of available
descriptors before sending packets to the hardware.

However, for AF_XDP, this check is unnecessary because the batch value
is already determined based on the free descriptors.

This patch introduces a new API, "otx2_xsk_sq_append_pkt" to address this.

Remove the logic for releasing the TX buffers, as it is implicitly handled
by xsk_tx_peek_release_desc_batch

Signed-off-by: Hariprasad Kelam <hkelam@marvell.com>
Link: https://patch.msgid.link/20250420032350.4047706-1-hkelam@marvell.com


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