efivars: no need to convert ENOENT → ENODATA twice

read_efi_options_variable() already does this, don#t do it again.

src/basic/efivars.c

@@ -439,9 +439,7 @@ int systemd_efi_options_efivarfs_if_newer(char **line) {
 
         r = read_efi_options_variable(line);
         if (r < 0)
-                log_warning_errno(r, "Failed to read SystemdOptions EFI variable: %m");
-        if (r == -ENOENT)
-                return -ENODATA;
-        return r;
+                return log_warning_errno(r, "Failed to read SystemdOptions EFI variable: %m");
+        return 0;
 }
 #endif