sunxi: Add sunxi_get_sid helper function

On sun6i the SID is stored in the pmic, rather then in the SoC itself,
add a helper function to abstract this away.

This makes our MAC address generation code also work on sun6i.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
3 files changed