kconfig: print recursive dependency errors in the parsed order

for_all_symbols() iterates in the symbol hash table. The order of
iteration depends on the hash table implementation.

If you use it for printing errors, they are shown in random order.

For example, the order of following test input and the corresponding
error do not match:
 - scripts/kconfig/tests/err_recursive_dep/Kconfig
 - scripts/kconfig/tests/err_recursive_dep/expected_stderr
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/parser.y

@@ -473,8 +473,7 @@ assign_val:
 
 void conf_parse(const char *name)
 {
-	struct symbol *sym;
-	int i;
+	struct menu *menu;
 
 	autoconf_cmd = str_new();
 
@@ -517,10 +516,23 @@ void conf_parse(const char *name)
 	}
 
 	menu_finalize(&rootmenu);
-	for_all_symbols(i, sym) {
-		if (sym_check_deps(sym))
+
+	menu = &rootmenu;
+	while (menu) {
+		if (menu->sym && sym_check_deps(menu->sym))
 			yynerrs++;
+
+		if (menu->list) {
+			menu = menu->list;
+			continue;
+		}
+
+		while (!menu->next && menu->parent)
+			menu = menu->parent;
+
+		menu = menu->next;
 	}
+
 	if (yynerrs)
 		exit(1);
 	conf_set_changed(true);

scripts/kconfig/tests/err_recursive_dep/expected_stderr

-Kconfig:11:error: recursive dependency detected!
-Kconfig:11:	symbol B is selected by B
+Kconfig:5:error: recursive dependency detected!
+Kconfig:5:	symbol A depends on A
 For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
-Kconfig:5:error: recursive dependency detected!
-Kconfig:5:	symbol A depends on A
+Kconfig:11:error: recursive dependency detected!
+Kconfig:11:	symbol B is selected by B
 For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
@@ -14,9 +14,9 @@ Kconfig:21:	symbol C2 depends on C1
 For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
-Kconfig:32:error: recursive dependency detected!
-Kconfig:32:	symbol D2 is selected by D1
+Kconfig:27:error: recursive dependency detected!
 Kconfig:27:	symbol D1 depends on D2
+Kconfig:32:	symbol D2 is selected by D1
 For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
@@ -26,13 +26,13 @@ Kconfig:42:	symbol E2 is implied by E1
 For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
-Kconfig:60:error: recursive dependency detected!
-Kconfig:60:	symbol G depends on G
+Kconfig:49:error: recursive dependency detected!
+Kconfig:49:	symbol F1 default value contains F2
+Kconfig:51:	symbol F2 depends on F1
 For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"
 
-Kconfig:51:error: recursive dependency detected!
-Kconfig:51:	symbol F2 depends on F1
-Kconfig:49:	symbol F1 default value contains F2
+Kconfig:60:error: recursive dependency detected!
+Kconfig:60:	symbol G depends on G
 For a resolution refer to Documentation/kbuild/kconfig-language.rst
 subsection "Kconfig recursive dependency limitations"