fdtdec: dtb_dt_embedded: replace ifdefs by IS_ENABLED()

Patch fixes the checkpatch warnings like:
```
  WARNING: Use 'if (IS_ENABLED(CONFIG...))' instead of '#if or #ifdef'
  #94: FILE: lib/fdtdec.c:102:
  +#ifdef CONFIG_OF_EMBED
```

Signed-off-by: Evgeny Bachinin <EABachinin@salutedevices.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
1 file changed