arm64: tegra: Enable UART instance on 40-pin header

On P3737 board, UART-A is available on 40-pin header. Enable UART-A for
P3737 and change the compatible string to "nvidia,tegra194-hsuart". This
allows supporting HW flow control and is the preferred choice for higher
baud rates.
Signed-off-by: kartik <kkartik@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm64/boot/dts/nvidia/tegra234-p3737-0000+p3701-0000.dts

@@ -14,6 +14,7 @@ / {
 	aliases {
 		mmc3 = "/bus@0/mmc@3460000";
 		serial0 = &tcu;
+		serial1 = &uarta;
 	};
 
 	bus@0 {
@@ -1743,6 +1744,11 @@ interrupt-controller@2a40000 {
 			};
 		};
 
+		serial@3100000 {
+			compatible = "nvidia,tegra194-hsuart";
+			status = "okay";
+		};
+
 		hda@3510000 {
 			nvidia,model = "NVIDIA Jetson AGX Orin HDA";
 		};