arm64: dts: r8a7795: Rename the serial port clock to fck

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

arch/arm64/boot/dts/renesas/r8a7795.dtsi

@@ -480,7 +480,7 @@ hscif0: serial@e6540000 {
 			reg = <0 0xe6540000 0 96>;
 			interrupts = <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 520>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac1 0x31>, <&dmac1 0x30>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -494,7 +494,7 @@ hscif1: serial@e6550000 {
 			reg = <0 0xe6550000 0 96>;
 			interrupts = <GIC_SPI 155 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 519>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac1 0x33>, <&dmac1 0x32>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -508,7 +508,7 @@ hscif2: serial@e6560000 {
 			reg = <0 0xe6560000 0 96>;
 			interrupts = <GIC_SPI 144 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 518>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac1 0x35>, <&dmac1 0x34>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -522,7 +522,7 @@ hscif3: serial@e66a0000 {
 			reg = <0 0xe66a0000 0 96>;
 			interrupts = <GIC_SPI 145 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 517>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac0 0x37>, <&dmac0 0x36>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -536,7 +536,7 @@ hscif4: serial@e66b0000 {
 			reg = <0 0xe66b0000 0 96>;
 			interrupts = <GIC_SPI 146 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 516>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac0 0x39>, <&dmac0 0x38>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -549,7 +549,7 @@ scif0: serial@e6e60000 {
 			reg = <0 0xe6e60000 0 64>;
 			interrupts = <GIC_SPI 152 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 207>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac1 0x51>, <&dmac1 0x50>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -562,7 +562,7 @@ scif1: serial@e6e68000 {
 			reg = <0 0xe6e68000 0 64>;
 			interrupts = <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 206>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac1 0x53>, <&dmac1 0x52>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -575,7 +575,7 @@ scif2: serial@e6e88000 {
 			reg = <0 0xe6e88000 0 64>;
 			interrupts = <GIC_SPI 164 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 310>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac1 0x13>, <&dmac1 0x12>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -588,7 +588,7 @@ scif3: serial@e6c50000 {
 			reg = <0 0xe6c50000 0 64>;
 			interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 204>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac0 0x57>, <&dmac0 0x56>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -601,7 +601,7 @@ scif4: serial@e6c40000 {
 			reg = <0 0xe6c40000 0 64>;
 			interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 203>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac0 0x59>, <&dmac0 0x58>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;
@@ -614,7 +614,7 @@ scif5: serial@e6f30000 {
 			reg = <0 0xe6f30000 0 64>;
 			interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
 			clocks = <&cpg CPG_MOD 202>;
-			clock-names = "sci_ick";
+			clock-names = "fck";
 			dmas = <&dmac1 0x5b>, <&dmac1 0x5a>;
 			dma-names = "tx", "rx";
 			power-domains = <&cpg>;