clang-format: update latest spec and reformat with clang-21

Copy the latest format file from the docs repository and apply using
clang-format-21.

See I795e88ada8e676c242b5a18888ce9c08afdedc93 for clang-21 enablement.

Change-Id: I46846988a94b2362ab1cccf3817976c422d0d646
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/cper-parse.i b/cper-parse.i
index 45c8d3a..b2f4409 100644
--- a/cper-parse.i
+++ b/cper-parse.i
@@ -7,8 +7,7 @@
 	}
 
 	//Library function declarations for module export.
-	json_object *
-	cper_to_ir(FILE *cper_file);
+	json_object *cper_to_ir(FILE *cper_file);
 void ir_to_cper(json_object *ir, FILE *out);
 
 //JSON function symbol export.