ARM: dts: r8a7778: Rename the serial port clock to fck

The clock is really the device functional clock, not the interface
clock. Rename it.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7778.dtsi

@@ -302,7 +302,7 @@ scif0: serial@ffe40000 {
 		reg = <0xffe40000 0x100>;
 		interrupts = <GIC_SPI 70 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7778_CLK_SCIF0>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&cpg_clocks>;
 		status = "disabled";
 	};
@@ -313,7 +313,7 @@ scif1: serial@ffe41000 {
 		reg = <0xffe41000 0x100>;
 		interrupts = <GIC_SPI 71 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7778_CLK_SCIF1>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&cpg_clocks>;
 		status = "disabled";
 	};
@@ -324,7 +324,7 @@ scif2: serial@ffe42000 {
 		reg = <0xffe42000 0x100>;
 		interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7778_CLK_SCIF2>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&cpg_clocks>;
 		status = "disabled";
 	};
@@ -335,7 +335,7 @@ scif3: serial@ffe43000 {
 		reg = <0xffe43000 0x100>;
 		interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7778_CLK_SCIF3>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&cpg_clocks>;
 		status = "disabled";
 	};
@@ -346,7 +346,7 @@ scif4: serial@ffe44000 {
 		reg = <0xffe44000 0x100>;
 		interrupts = <GIC_SPI 74 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7778_CLK_SCIF4>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&cpg_clocks>;
 		status = "disabled";
 	};
@@ -357,7 +357,7 @@ scif5: serial@ffe45000 {
 		reg = <0xffe45000 0x100>;
 		interrupts = <GIC_SPI 75 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp0_clks R8A7778_CLK_SCIF5>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&cpg_clocks>;
 		status = "disabled";
 	};