Add vendor_dlkm partition.

Test: define vendor_dlkm for CF.
Bug: 156020364

Change-Id: I459059e1c20df7a285a377b8b3bbc8decc60b124
diff --git a/tools/releasetools/check_target_files_vintf.py b/tools/releasetools/check_target_files_vintf.py
index 95d09cc..79005df 100755
--- a/tools/releasetools/check_target_files_vintf.py
+++ b/tools/releasetools/check_target_files_vintf.py
@@ -46,6 +46,7 @@
     '/product': ('PRODUCT', 'SYSTEM/product'),
     '/odm': ('ODM', 'VENDOR/odm', 'SYSTEM/vendor/odm'),
     '/system_ext': ('SYSTEM_EXT', 'SYSTEM/system_ext'),
+    # vendor_dlkm does not have VINTF files.
 }
 
 UNZIP_PATTERN = ['META/*', '*/build.prop']