net/bnxt: fix accumulation of flow counters

net/bnxt: fix accumulation of flow counters

OVS-DPDK is accumulating the flow counters that are returned as part of
the flow_query API and it is being issued at least 3 times every second.
So there is no need to accumulate the counts internally in the driver.

Fixes: 306c2d28e247 ("net/bnxt: support count action in flow query")

Signed-off-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>