Fix USB adb driver

lichee/linux-4.9/drivers/usb/sunxi_usb/manager/usb_manager.c

@@ -50,7 +50,7 @@ atomic_t thread_suspend_flag;
 static int usb_device_scan_thread(void *pArg)
 {
 	/* delay for udc & hcd ready */
-	msleep(3000);
+	msleep(5000);
 
 	while (thread_device_run_flag) {
 

target/allwinner/mandolin-common/base-files/etc/rc.local

@@ -1,7 +0,0 @@
-# Put your custom commands here that should be executed once
-# the system init finished. By default this file does nothing.
-
-# patch for enable usb adb
-cat /sys/devices/platform/soc/usbc0/usb_device
-
-exit 0