This adds a basic configuration for editorconfig checker. The
supplied configuration checks against trailing whitespaces and
issues with newlines.
Example:
| tools/packaging/kernel/configs/fragments/x86_64/numa.conf:
| Wrong line endings or no final newline
| tools/packaging/release/generate_vendor.sh:
| 44: Trailing whitespace
Signed-off-by: Manuel Huber <manuelh@nvidia.com>