rocker: add copyright

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
rocker: implement PORT_PHYS_COUNT register read

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>