arm64: dts: r8a7796: Add missing second pair of DMA names to MSIOF nodes

MSIOF0 and MSIOF1 are tied to two DMA controllers through two pairs of
DMA specifiers.  However, the second pair of corresponding DMA names was
missing.

Fixes: 80fab06e ("arm64: dts: r8a7796: Add all MSIOF nodes")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm64/boot/dts/renesas/r8a7796.dtsi

@@ -999,7 +999,7 @@ msiof0: spi@e6e90000 {
 			clocks = <&cpg CPG_MOD 211>;
 			dmas = <&dmac1 0x41>, <&dmac1 0x40>,
 			       <&dmac2 0x41>, <&dmac2 0x40>;
-			dma-names = "tx", "rx";
+			dma-names = "tx", "rx", "tx", "rx";
 			power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
 			resets = <&cpg 211>;
 			#address-cells = <1>;
@@ -1015,7 +1015,7 @@ msiof1: spi@e6ea0000 {
 			clocks = <&cpg CPG_MOD 210>;
 			dmas = <&dmac1 0x43>, <&dmac1 0x42>,
 			       <&dmac2 0x43>, <&dmac2 0x42>;
-			dma-names = "tx", "rx";
+			dma-names = "tx", "rx", "tx", "rx";
 			power-domains = <&sysc R8A7796_PD_ALWAYS_ON>;
 			resets = <&cpg 210>;
 			#address-cells = <1>;