boot.patch

--- boot.txt	2018-02-20 12:52:33.000000000 -0700
+++ boot.txt.new	2018-02-20 12:50:54.000000000 -0700
@@ -1,12 +1,20 @@
-# After modifying, run ./mkscr
-
 if test -n ${distro_bootpart}; then setenv bootpart ${distro_bootpart}; else setenv bootpart 1; fi
 part uuid ${devtype} ${devnum}:${bootpart} uuid
 
+setenv overlays sun8i-h3-usbhost2 sun8i-h3-usbhost3
 setenv bootargs console=${console} root=PARTUUID=${uuid} rw rootwait
+setenv overlay_addr 0x44000000
 
 if load ${devtype} ${devnum}:${bootpart} ${kernel_addr_r} /boot/zImage; then
   if load ${devtype} ${devnum}:${bootpart} ${fdt_addr_r} /boot/dtbs/${fdtfile}; then
+    fdt addr ${fdt_addr_r}
+    fdt resize 65536
+    for overlay_file in ${overlays}; do
+      load ${devtype} ${devnum}:${bootpart} ${overlay_addr} /boot/dtbs/overlay/${overlay_file}.dtb
+      echo "fdt apply ${overlay_addr}"
+      fdt apply ${overlay_addr}
+      echo "Applied /boot/dtbs/overlay/${overlay_file}.dtb"
+    done
     if load ${devtype} ${devnum}:${bootpart} ${ramdisk_addr_r} /boot/initramfs-linux.img; then
       bootz ${kernel_addr_r} ${ramdisk_addr_r}:${filesize} ${fdt_addr_r};
     else