various: move const ptr indicator to return value

src/basic/fd-util.c

@@ -1091,7 +1091,7 @@ int fds_are_same_mount(int fd1, int fd2) {
         return statx_mount_same(&st1.nsx, &st2.nsx);
 }
 
-const char *accmode_to_string(int flags) {
+const char* accmode_to_string(int flags) {
         switch (flags & O_ACCMODE) {
         case O_RDONLY:
                 return "ro";