scripts/config: fix handling of CONFDEFAULT on oldconfig

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 47372

scripts/config/confdata.c

@@ -1166,6 +1166,8 @@ bool conf_set_all_new_symbols(enum conf_def_mode mode)
 	}
 	bool has_changed = false;
 
+	sym_clear_all_valid();
+
 	for_all_symbols(i, sym) {
 		if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
 			continue;
@@ -1209,8 +1211,6 @@ bool conf_set_all_new_symbols(enum conf_def_mode mode)
 
 	}
 
-	sym_clear_all_valid();
-
 	/*
 	 * We have different type of choice blocks.
 	 * If curr.tri equals to mod then we can select several