dt-bindings: clock: sunxi-ccu: Add compatibles for sun5i CCU driver

The bindings were not updated when the sun5i CCU driver was added in
commit 5e737617 ("clk: sunxi-ng: Add sun5i CCU driver").

Signed-off-by: Jonathan Liu <net147@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>