net: ethernet: ti: am65-cpsw: Fix RX statistics for XDP_TX and XDP_REDIRECT

We are not using ndev->stats for rx_packets and rx_bytes anymore.
Instead, we use per CPU stats which are collated in
am65_cpsw_nuss_ndo_get_stats().

Fix RX statistics for XDP_TX and XDP_REDIRECT cases.

Fixes: 8acacc40 ("net: ethernet: ti: am65-cpsw: Add minimal XDP support")
Signed-off-by: Roger Quadros <rogerq@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Acked-by: Julien Panis <jpanis@baylibre.com>
Reviewed-by: MD Danish Anwar <danishanwar@ti.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>