net/bnxt: check and set initial counter ID

net/bnxt: check and set initial counter ID

Instead of relying on value of Flow counter ID to determine validity
have an explicit boolean flag for the same to check and set.

Fixes: 306c2d28e247 ("net/bnxt: support count action in flow query")
Fixes: 9cf9c8385df7 ("net/bnxt: add ULP flow counter manager")
Cc: stable@dpdk.org
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>