dt-bindings: update device tree binding for Allwinner PRCM CCUs

Many Allwinner SoCs after A31 have a CCU in PRCM block.

Give the ones on H3 and A64 compatible strings.
Signed-off-by: NIcenowy Zheng <icenowy@aosc.xyz>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>

Documentation/devicetree/bindings/clock/sunxi-ccu.txt

@@ -7,9 +7,11 @@ Required properties :
 		- "allwinner,sun8i-a23-ccu"
 		- "allwinner,sun8i-a33-ccu"
 		- "allwinner,sun8i-h3-ccu"
+		- "allwinner,sun8i-h3-r-ccu"
 		- "allwinner,sun8i-v3s-ccu"
 		- "allwinner,sun9i-a80-ccu"
 		- "allwinner,sun50i-a64-ccu"
+		- "allwinner,sun50i-a64-r-ccu"
 		- "allwinner,sun50i-h5-ccu"
 
 - reg: Must contain the registers base address and length
@@ -20,7 +22,10 @@ Required properties :
 - #clock-cells : must contain 1
 - #reset-cells : must contain 1
 
-Example:
+For the PRCM CCUs on H3/A64, one more clock is needed:
+- "iosc": the SoC's internal frequency oscillator
+
+Example for generic CCU:
 ccu: clock@01c20000 {
 	compatible = "allwinner,sun8i-h3-ccu";
 	reg = <0x01c20000 0x400>;
@@ -29,3 +34,13 @@ ccu: clock@01c20000 {
 	#clock-cells = <1>;
 	#reset-cells = <1>;
 };
+
+Example for PRCM CCU:
+r_ccu: clock@01f01400 {
+	compatible = "allwinner,sun50i-a64-r-ccu";
+	reg = <0x01f01400 0x100>;
+	clocks = <&osc24M>, <&osc32k>, <&iosc>;
+	clock-names = "hosc", "losc", "iosc";
+	#clock-cells = <1>;
+	#reset-cells = <1>;
+};