bnxt_en: Add hardware NTUPLE filter for encapsulated packets.

bnxt_en: Add hardware NTUPLE filter for encapsulated packets.

Orabug: 25645429

If skb_flow_dissect_flow_keys() returns with the encapsulation flag
set, pass the information to the firmware to setup the NTUPLE filter
accordingly.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 61aad724ec0a685bc83b02b059a3ca0ad3bde6b0)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Conflicts:
	drivers/net/ethernet/broadcom/bnxt/bnxt.c