dt-bindings: ap80x: Document AP807 CPU clock compatible

Add AP807 CPU clock compatible to the bindings.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lkml.kernel.org/r/20190805100310.29048-2-miquel.raynal@bootlin.comReviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

Documentation/devicetree/bindings/arm/marvell/ap806-system-controller.txt

@@ -147,11 +147,14 @@ ap_syscon1: system-controller@6f8000 {
 Cluster clocks:
 ---------------
 
-Device Tree Clock bindings for cluster clock of AP806 Marvell. Each
-cluster contain up to 2 CPUs running at the same frequency.
+Device Tree Clock bindings for cluster clock of Marvell
+AP806/AP807. Each cluster contain up to 2 CPUs running at the same
+frequency.
 
 Required properties:
-- compatible: must be  "marvell,ap806-cpu-clock";
+ - compatible: must be one of:
+   * "marvell,ap806-cpu-clock"
+   * "marvell,ap807-cpu-clock"
 - #clock-cells : should be set to 1.
 
 - clocks : shall be the input parent clock(s) phandle for the clock