eth: fbnic: report software Rx queue stats

Gather and report software Rx queue stats - checksum stats
and allocation failures.

Acked-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://patch.msgid.link/20250211181356.580800-4-kuba@kernel.org


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