treewide: apply errno.cocci

with small manual cleanups for style.

src/binfmt/binfmt.c

@@ -94,8 +94,7 @@ static int apply_file(const char *path, bool ignore_enoent) {
                         if (feof(f))
                                 break;
 
-                        log_error_errno(errno, "Failed to read file '%s', ignoring: %m", path);
-                        return -errno;
+                        return log_error_errno(errno, "Failed to read file '%s', ignoring: %m", path);
                 }
 
                 p = strstrip(l);