nvmem: sunxi-sid: add support for H5's SID controller

The H5 SoC have a SID controller that looks like the one in A64, the
cells are in the same offset but doesn't contain the same data (thermal
sensor calibration for example).
Add a binding for it.

Signed-off-by: Emmanuel Vadot <manu@freebsd.org>
Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>