ARM: dts: r8a73a4: 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/r8a73a4.dtsi

@@ -335,7 +335,7 @@ scifb0: serial@e6c20000 {
 		reg = <0 0xe6c20000 0 0x100>;
 		interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A73A4_CLK_SCIFB0>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&pd_a3sp>;
 		status = "disabled";
 	};
@@ -345,7 +345,7 @@ scifb1: serial@e6c30000 {
 		reg = <0 0xe6c30000 0 0x100>;
 		interrupts = <GIC_SPI 149 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A73A4_CLK_SCIFB1>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&pd_a3sp>;
 		status = "disabled";
 	};
@@ -355,7 +355,7 @@ scifa0: serial@e6c40000 {
 		reg = <0 0xe6c40000 0 0x100>;
 		interrupts = <GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A73A4_CLK_SCIFA0>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&pd_a3sp>;
 		status = "disabled";
 	};
@@ -365,7 +365,7 @@ scifa1: serial@e6c50000 {
 		reg = <0 0xe6c50000 0 0x100>;
 		interrupts = <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A73A4_CLK_SCIFA1>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&pd_a3sp>;
 		status = "disabled";
 	};
@@ -375,7 +375,7 @@ scifb2: serial@e6ce0000 {
 		reg = <0 0xe6ce0000 0 0x100>;
 		interrupts = <GIC_SPI 150 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A73A4_CLK_SCIFB2>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&pd_a3sp>;
 		status = "disabled";
 	};
@@ -385,7 +385,7 @@ scifb3: serial@e6cf0000 {
 		reg = <0 0xe6cf0000 0 0x100>;
 		interrupts = <GIC_SPI 151 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp2_clks R8A73A4_CLK_SCIFB3>;
-		clock-names = "sci_ick";
+		clock-names = "fck";
 		power-domains = <&pd_c4>;
 		status = "disabled";
 	};