in both the stable and the testing kernel
h2+/h3/h5 devices have a Secure ID that can be read from
`/sys/bus/nvmem/devices/sunxi-sid0/nvmem`.
Enabling CONFIG_NVMEM_SYSFS grants sysfs access from userspace.
Signed-off-by: Jan-Niklas Burfeind <git@aiyionpri.me>