clang-format: re-format for clang-18

clang-format-18 isn't compatible with the clang-format-17 output, so we
need to reformat the code with the latest version.  The way clang-18
handles lambda formatting also changed, so we have made changes to the
organization default style format to better handle lambda formatting.

See I5e08687e696dd240402a2780158664b7113def0e for updated style.
See Iea0776aaa7edd483fa395e23de25ebf5a6288f71 for clang-18 enablement.

Change-Id: I21d2ca8065f24fd73509229c517f5caf48934b60
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/extensions/openpower-pels/severity.hpp b/extensions/openpower-pels/severity.hpp
index a1c1a59..818eb0f 100644
--- a/extensions/openpower-pels/severity.hpp
+++ b/extensions/openpower-pels/severity.hpp
@@ -36,8 +36,7 @@
  *         found, otherwise std::nullopt which means the original one
  *         is good enough.
  */
-std::optional<phosphor::logging::Entry::Level>
-    fixupLogSeverity(phosphor::logging::Entry::Level obmcSeverity,
-                     SeverityType pelSeverity);
+std::optional<phosphor::logging::Entry::Level> fixupLogSeverity(
+    phosphor::logging::Entry::Level obmcSeverity, SeverityType pelSeverity);
 } // namespace pels
 } // namespace openpower