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/include/dt-bindings/reset/amlogic,meson-gxbb-reset.h b/include/dt-bindings/reset/amlogic,meson-gxbb-reset.h
index ea50586..883bfd3 100644
--- a/include/dt-bindings/reset/amlogic,meson-gxbb-reset.h
+++ b/include/dt-bindings/reset/amlogic,meson-gxbb-reset.h
@@ -69,7 +69,7 @@
 #define RESET_SYS_CPU_L2		58
 #define RESET_SYS_CPU_P			59
 #define RESET_SYS_CPU_MBIST		60
-/*					61	*/
+#define RESET_ACODEC			61
 /*					62	*/
 /*					63	*/
 /*	RESET2					*/