ARM: dts: meson: add the gadget mode properties to the USB0 controller

Testing with a USB RNDIS connection and iperf3 gives the following
results:
- From the host computer to the device at ~250Mbit/s
- From the device to the host computer at ~76Mbit/s

Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200504195105.2909711-1-martin.blumenstingl@googlemail.com

arch/arm/boot/dts/meson.dtsi

@@ -229,6 +229,9 @@
 			interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH>;
 			phys = <&usb0_phy>;
 			phy-names = "usb2-phy";
+			g-rx-fifo-size = <512>;
+			g-np-tx-fifo-size = <500>;
+			g-tx-fifo-size = <256 192 128 128 128>;
 			dr_mode = "host";
 			status = "disabled";
 		};