bnxt_en: Pass DCB RoCE app priority to firmware.

bnxt_en: Pass DCB RoCE app priority to firmware.

Orabug: 26402533, 26325599, 26366387

When the driver gets the RoCE app priority set/delete call through DCBNL,
the driver will send the information to the firmware to set up the
priority VLAN tag for RDMA traffic.

[ New version using the common ETH_P_IBOE constant in if_ether.h ]

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit a82fba8dbfb522bd19b1644bf599135680fd0122)
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Signed-off-by: Somasundaram Krishnasamy <somasundaram.krishnasamy@oracle.com>