dt/bindings: drm/komeda: Unify mclk/pclk/pipeline->aclk to one ACLK

Current komeda driver uses three dedicated clks for a specific purpose:
- mclk: main engine clock
- pclk: APB clock
- pipeline->aclk: AXI clock.

But per spec the komeda HW only has three input clks:
- ACLK: used for AXI masters, APB slave and most pipeline processing
- PXCLK for pipeline 0: output pixel clock for pipeline 0
- PXCLK for pipeline 1: output pixel clock for pipeline 1

So one ACLK is enough, no need to split it to three mclk/pclk/axiclk.
Signed-off-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>

Documentation/devicetree/bindings/display/arm,komeda.txt

@@ -7,8 +7,7 @@ Required properties:
 - clocks: A list of phandle + clock-specifier pairs, one for each entry
     in 'clock-names'
 - clock-names: A list of clock names. It should contain:
-      - "mclk": for the main processor clock
-      - "pclk": for the APB interface clock
+      - "aclk": for the main processor clock
 - #address-cells: Must be 1
 - #size-cells: Must be 0
 - iommus: configure the stream id to IOMMU, Must be configured if want to
@@ -24,7 +23,6 @@ pipeline node should provide properties:
     in 'clock-names'
 - clock-names: should contain:
       - "pxclk": pixel clock
-      - "aclk": AXI interface clock
 
 - port: each pipeline connect to an encoder input port. The connection is
     modeled using the OF graph bindings specified in
@@ -46,15 +44,15 @@ Example:
 		compatible = "arm,mali-d71";
 		reg = <0xc00000 0x20000>;
 		interrupts = <0 168 4>;
-		clocks = <&dpu_mclk>, <&dpu_aclk>;
-		clock-names = "mclk", "pclk";
+		clocks = <&dpu_aclk>;
+		clock-names = "aclk";
 		iommus = <&smmu 0>, <&smmu 1>, <&smmu 2>, <&smmu 3>,
 			<&smmu 4>, <&smmu 5>, <&smmu 6>, <&smmu 7>,
 			<&smmu 8>, <&smmu 9>;
 
 		dp0_pipe0: pipeline@0 {
-			clocks = <&fpgaosc2>, <&dpu_aclk>;
-			clock-names = "pxclk", "aclk";
+			clocks = <&fpgaosc2>;
+			clock-names = "pxclk";
 			reg = <0>;
 
 			port {
@@ -65,8 +63,8 @@ Example:
 		};
 
 		dp0_pipe1: pipeline@1 {
-			clocks = <&fpgaosc2>, <&dpu_aclk>;
-			clock-names = "pxclk", "aclk";
+			clocks = <&fpgaosc2>;
+			clock-names = "pxclk";
 			reg = <1>;
 
 			port {