ARM: shmobile: r8a7740 dtsi: Fix SCIFB naming

The single SCIFB on R-Mobile A1 is called "scifb", not "scifb8".
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/r8a7740.dtsi

@@ -275,7 +275,7 @@ scifa7: serial@e6cd0000 {
 		status = "disabled";
 	};
 
-	scifb8: serial@e6c30000 {
+	scifb: serial@e6c30000 {
 		compatible = "renesas,scifb-r8a7740", "renesas,scifb";
 		reg = <0xe6c30000 0x100>;
 		interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>;