clang-tidy: format with config-clang-tidy

Reformat the .clang-tidy file for consistency using the
config-clang-tidy tool from openbmc-build-scripts.

Change-Id: Ia4a8b95464ab203592ecda3c50c308a0e9aab7c2
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>