dt-bindings: arm: amlogic: update libretech-cc compatible

Update the compatible for the Libre Computer aml-s905x-cc to be more
descriptive using the format introduced with the aml-s805x-ac board.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>