ionic: ionic_if bits for sr-iov support

Adds new AdminQ calls and their related structs for
supporting PF controls on VFs:
    CMD_OPCODE_VF_GETATTR
    CMD_OPCODE_VF_SETATTR

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>