bnxt_en: Set MASTER flag during driver registration.

The Linux driver is capable of being the master function to handle
resets, so we set the flag to let firmware know.  Some other
drivers, such as DPDK, is not capable and will not set the flag.

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>