arm64: dts: renesas: Drop clock-names property from RPC node

With 'unevaluatedProperties' support implemented, there are a number of
warnings when running dtbs_check:

arch/arm64/boot/dts/renesas/r8a774b1-hihope-rzg2n-rev2-ex-idk-1110wr.dtb: spi@ee200000: Unevaluated properties are not allowed ('clock-names' was unexpected)
	From schema: Documentation/devicetree/bindings/memory-controllers/renesas,rpc-if.yaml

The main problem is that the DT bindings do not allow clock-names.
So just drop the clock-names properties from the SoC DTSI files.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20220829215128.5983-1-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/r8a774a1.dtsi

@@ -2323,7 +2323,6 @@ rpc: spi@ee200000 {
 			reg-names = "regs", "dirmap", "wbuf";
 			interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 917>;
-			clock-names = "rpc";
 			power-domains = <&sysc R8A774A1_PD_ALWAYS_ON>;
 			resets = <&cpg 917>;
 			#address-cells = <1>;

arch/arm64/boot/dts/renesas/r8a774b1.dtsi

@@ -2191,7 +2191,6 @@ rpc: spi@ee200000 {
 			reg-names = "regs", "dirmap", "wbuf";
 			interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 917>;
-			clock-names = "rpc";
 			power-domains = <&sysc R8A774B1_PD_ALWAYS_ON>;
 			resets = <&cpg 917>;
 			#address-cells = <1>;

arch/arm64/boot/dts/renesas/r8a774c0.dtsi

@@ -1671,7 +1671,6 @@ rpc: spi@ee200000 {
 			reg-names = "regs", "dirmap", "wbuf";
 			interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 917>;
-			clock-names = "rpc";
 			power-domains = <&sysc R8A774C0_PD_ALWAYS_ON>;
 			resets = <&cpg 917>;
 			#address-cells = <1>;

arch/arm64/boot/dts/renesas/r8a774e1.dtsi

@@ -2423,7 +2423,6 @@ rpc: spi@ee200000 {
 			reg-names = "regs", "dirmap", "wbuf";
 			interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 917>;
-			clock-names = "rpc";
 			power-domains = <&sysc R8A774E1_PD_ALWAYS_ON>;
 			resets = <&cpg 917>;
 			#address-cells = <1>;

arch/arm64/boot/dts/renesas/r8a77970.dtsi

@@ -1045,7 +1045,6 @@ rpc: spi@ee200000 {
 			reg-names = "regs", "dirmap", "wbuf";
 			interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 917>;
-			clock-names = "rpc";
 			power-domains = <&sysc R8A77970_PD_ALWAYS_ON>;
 			resets = <&cpg 917>;
 			#address-cells = <1>;

arch/arm64/boot/dts/renesas/r8a77980.dtsi

@@ -1350,7 +1350,6 @@ rpc: spi@ee200000 {
 			reg-names = "regs", "dirmap", "wbuf";
 			interrupts = <GIC_SPI 38 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 917>;
-			clock-names = "rpc";
 			power-domains = <&sysc R8A77980_PD_ALWAYS_ON>;
 			resets = <&cpg 917>;
 			#address-cells = <1>;

arch/arm64/boot/dts/renesas/r8a779a0.dtsi

@@ -2086,7 +2086,6 @@ rpc: spi@ee200000 {
 			reg-names = "regs", "dirmap", "wbuf";
 			interrupts = <GIC_SPI 135 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 629>;
-			clock-names = "rpc";
 			power-domains = <&sysc R8A779A0_PD_ALWAYS_ON>;
 			resets = <&cpg 629>;
 			#address-cells = <1>;