bnxt_en: Propagate trusted VF attribute to firmware.

Newer firmware understands the concept of a trusted VF, so propagate the
trusted VF attribute set by the PF admin. to the firmware.  Also, check
the firmware trusted setting when considering the VF MAC address change
and reporting the trusted setting to the user.

Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>