ARM: shmobile: r8a7791 dtsi: Enable DMA for QSPI

Add a DMA property to the QSPI node
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/r8a7791.dtsi

@@ -1012,6 +1012,8 @@ qspi: spi@e6b10000 {
 		reg = <0 0xe6b10000 0 0x2c>;
 		interrupts = <0 184 IRQ_TYPE_LEVEL_HIGH>;
 		clocks = <&mstp9_clks R8A7791_CLK_QSPI_MOD>;
+		dmas = <&dmac0 0x17>, <&dmac0 0x18>;
+		dma-names = "tx", "rx";
 		num-cs = <1>;
 		#address-cells = <1>;
 		#size-cells = <0>;