dt-bindings: power: xilinx: merge zynqmp-genpd.txt with firmware binding

Remove the zynqmp-genpd.txt binding. Add the power-domain-cells
property from the zynqmp-genpd.txt binding to firmware binding.
Signed-off-by: Naman Trivedi Manojbhai <naman.trivedimanojbhai@amd.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230816130309.1338446-1-naman.trivedimanojbhai@amd.comSigned-off-by: Rob Herring <robh@kernel.org>

Documentation/devicetree/bindings/firmware/xilinx/xlnx,zynqmp-firmware.yaml

@@ -38,6 +38,9 @@ properties:
       - smc
       - hvc
 
+  "#power-domain-cells":
+    const: 1
+
   versal_fpga:
     $ref: /schemas/fpga/xlnx,versal-fpga.yaml#
     description: Compatible of the FPGA device.
@@ -66,6 +69,17 @@ additionalProperties: false
 
 examples:
   - |
+    #include <dt-bindings/power/xlnx-zynqmp-power.h>
+    firmware {
+      zynqmp_firmware: zynqmp-firmware {
+        #power-domain-cells = <1>;
+        };
+    };
+
+    sata {
+      power-domains = <&zynqmp_firmware PD_SATA>;
+    };
+
     versal-firmware {
       compatible = "xlnx,versal-firmware";
       method = "smc";

Documentation/devicetree/bindings/power/xlnx,zynqmp-genpd.txt

------------------------------------------------------------
-Device Tree Bindings for the Xilinx Zynq MPSoC PM domains
------------------------------------------------------------
-The binding for zynqmp-power-controller follow the common
-generic PM domain binding[1].
-
-[1] Documentation/devicetree/bindings/power/power-domain.yaml
-
-== Zynq MPSoC Generic PM Domain Node ==
-
-Required property:
- - Below property should be in zynqmp-firmware node.
- - #power-domain-cells:	Number of cells in a PM domain specifier. Must be 1.
-
-Power domain ID indexes are mentioned in
-include/dt-bindings/power/xlnx-zynqmp-power.h.
-
--------
-Example
--------
-
-firmware {
-	zynqmp_firmware: zynqmp-firmware {
-		...
-		#power-domain-cells = <1>;
-		...
-	};
-};
-
-sata {
-	...
-	power-domains = <&zynqmp_firmware 28>;
-	...
-};