bnxt_en: Add basic support for Nitro in North Star 2.

bnxt_en: Add basic support for Nitro in North Star 2.

Orabug: 24567991

Nitro is the embedded version of the ethernet controller in the North
Star 2 SoC.  Add basic code to recognize the chip ID and disable
the features (ntuple, TPA, ring and port statistics) not supported on
Nitro A0.

Signed-off-by: Prashant Sreedharan <prashant.sreedharan@broadcom.com>
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 3e8060fa837630f6fb4acbf59ba588c6df5b2f50)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	drivers/net/ethernet/broadcom/bnxt/bnxt.c

Signed-off-by: Dhaval Giani <dhaval.giani@oracle.com>