net: ena: fix return value of ena_com_config_llq_info()

ena_com_config_llq_info() returns 0 even if ena_com_set_llq() fails.
Return the failure code of ena_com_set_llq() in case it fails.

fixes: 689b2bda ("net: ena: add functions for handling Low Latency Queues in ena_com")

Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>