net/bnxt: support exact match

net/bnxt: support exact match

- Add Exact Match support
- Create EM table pool of memory indices
- Insert exact match internal entry API
- Sends EM internal insert and delete request to firmware

Signed-off-by: Peter Spreadborough <peter.spreadborough@broadcom.com>
Signed-off-by: Venkat Duvvuru <venkatkumar.duvvuru@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>