Style: Remove unnecessary semicolons from core

Semicolons are not necessary after function definitions or control flow
blocks, and having some code use them makes things inconsistent (and
occasionally can mess up `clang-format`'s formatting).

Removing them is tedious work though, I had to do this manually (regex
+ manual review) as I couldn't find a tool for that. All other code
folders would need to get the same treatment.

core/io/marshalls.h

@@ -106,7 +106,7 @@ static inline int encode_cstring(const char *p_string, uint8_t *p_data) {
 		}
 		p_string++;
 		len++;
-	};
+	}
 
 	if (p_data) {
 		*p_data = 0;