Merge "Allow empty --kernel." am: e4cf8e9a59 am: 328bb08855

Original change: https://android-review.googlesource.com/c/platform/system/tools/mkbootimg/+/1470525

Change-Id: Icbc316af3a531df37882ea5040cc896b24eb97a4
diff --git a/mkbootimg.py b/mkbootimg.py
index 00a4623..2d0eec7 100644
--- a/mkbootimg.py
+++ b/mkbootimg.py
@@ -296,8 +296,6 @@
         write_vendor_boot_header(args)
         write_vendor_boot_data(args)
     if args.output is not None:
-        if args.kernel is None:
-            raise ValueError('kernel must be supplied when creating a boot image')
         if args.second is not None and args.header_version > 2:
             raise ValueError('--second not compatible with given header version')
         img_id = write_header(args)