net/bnxt: support EM/EEM

net/bnxt: support EM/EEM

- Add TruFlow flow memory support
- Exact Match (EM) adds the capability to manage and manipulate
  data flows using on chip memory.
- Extended Exact Match (EEM) behaves similarly to EM, but at a
  vastly increased scale by using host DDR, with performance
  trade-off due to the need to access off-chip memory.

Signed-off-by: Pete Spreadborough <peter.spreadborough@broadcom.com>
Reviewed-by: Randy Schacher <stuart.schacher@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>