dt-bindings: arm: amlogic: add support for libretch s905x cc v2

Add support for the 2nd version of the libretch aml-s905x-cc.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200915141921.57258-2-jbrunet@baylibre.com