Fix clang-format config
- Update the clang-format config so that the formatted file
compliant with 4-space indentation rule enforced by linter.
- Use Google style as the base format to get more consistent indentation of 4 spaces.
- Add extra configs to avoid non-4-space alignment.
Signed-off-by: Viet-Hoa Do viet-hoa.do@arm.com