AK2: Move flash_dtbo into write_boot

split_boot is for fine grained control over what exactly gets flashed
at what point. It makes more sense for flash_dtbo to live in write_boot,
which does everything all at once.

Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>

tools/ak2-core.sh

@@ -335,11 +335,11 @@ flash_boot() {
     dd if=/dev/zero of=$block 2>/dev/null;
     dd if=/tmp/anykernel/boot-new.img of=$block;
   fi;
-  flash_dtbo;
 }
 write_boot() {
   repack_ramdisk;
   flash_boot;
+  flash_dtbo;
 }
 
 # backup_file <file>