ARM: dts: r8a7794: Correct clock of DU1

The second channel of the display unit uses a different module clock
than the first channel.

Fixes: 46c4f13d ("ARM: shmobile: r8a7794: Add DU node to device tree")
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/arm/boot/dts/r8a7794.dtsi

@@ -925,7 +925,7 @@ du: display@feb00000 {
 		interrupts = <GIC_SPI 256 IRQ_TYPE_LEVEL_HIGH>,
 			     <GIC_SPI 268 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp7_clks R8A7794_CLK_DU0>,
-			 <&mstp7_clks R8A7794_CLK_DU0>;
+			 <&mstp7_clks R8A7794_CLK_DU1>;
 		clock-names = "du.0", "du.1";
 		status = "disabled";