be2net: Fix memory leak in be_cmd_get_profile_config()

DMA allocated memory is lost in be_cmd_get_profile_config() when we
call it with non-NULL port_res parameter.

Signed-off-by: Petr Oros <poros@redhat.com>
Reviewed-by: Ivan Vecera <ivecera@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>