arm64: tegra: Add dma-coherent property for Tegra194 XUDC

DMA operations for XUSB device controller (XUDC) are coherent for
Tegra194 and so add the 'dma-coherent' property for this device.

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

Author: jonhunter

arch/arm64/boot/dts/nvidia/tegra194.dtsi

@@ -1294,6 +1294,7 @@
 					<&bpmp TEGRA194_POWER_DOMAIN_XUSBA>;
 			power-domain-names = "dev", "ss";
 			nvidia,xusb-padctl = <&xusb_padctl>;
+			dma-coherent;
 			status = "disabled";
 		};