net/bnxt: fix Rx checksum flags

net/bnxt: fix Rx checksum flags

Fix the Rx offload flags when the IP or L4 checksum is seen as incorrect
by the hardware. In this case, the proper value is PKT_RX_IP_CKSUM_BAD.

PKT_RX_IP_CKSUM_NONE means that the checksum may be incorrect in the
packet headers, but the integrity of the IP header is verified. This is
mostly useful for virtual drivers.

Fixes: 7ec39d8c524b ("net/bnxt: update status of Rx IP/L4 CKSUM")
Cc: stable@dpdk.org
Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Ajit Khaparde <ajit.khaparde@broadcom.com>