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-gxm.dtsi b/arch/arm/dts/meson-gxm.dtsi
index b6f89f1..40e3e12 100644
--- a/arch/arm/dts/meson-gxm.dtsi
+++ b/arch/arm/dts/meson-gxm.dtsi
@@ -169,8 +169,11 @@
 	compatible = "amlogic,meson-gxm-dw-hdmi", "amlogic,meson-gx-dw-hdmi";
 };
 
-&dwc3 {
-	phys = <&usb3_phy>, <&usb2_phy0>, <&usb2_phy1>, <&usb2_phy2>;
+&usb {
+	compatible = "amlogic,meson-gxm-usb-ctrl";
+
+	phy-names = "usb2-phy0", "usb2-phy1", "usb2-phy2";
+	phys = <&usb2_phy0>, <&usb2_phy1>, <&usb2_phy2>;
 };
 
 &vdec {