ARM: dts: sync amlogic AXG/GXL/GXM DT from Linux 5.8-rc1

This imports the AXG, GXL & GXM SoC and boards DT changes from the Linux
commit b3a9e3b9622a ("Linux 5.8-rc1").

This change also removes GXL & GXM u-boot.dtsi hacks for USB gadget.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/arch/arm/dts/meson-gxl-s905x-khadas-vim.dts b/arch/arm/dts/meson-gxl-s905x-khadas-vim.dts
index 440bc23..8bcdffd 100644
--- a/arch/arm/dts/meson-gxl-s905x-khadas-vim.dts
+++ b/arch/arm/dts/meson-gxl-s905x-khadas-vim.dts
@@ -207,3 +207,7 @@
 	pinctrl-0 = <&uart_ao_b_pins>;
 	pinctrl-names = "default";
 };
+
+&usb {
+	dr_mode = "peripheral";
+};