[PATCH] kconfig: trivial cleanup

Replace all menu_add_prop mimicking menu_add_prompt with the latter func. I've
had to add a return value to menu_add_prompt for one usage.

I've rebuilt scripts/kconfig/zconf.tab.c_shipped by hand to reflect changes
in the source (I've not the same Bison version so regenerating it wouldn't
have been not a good idea), and compared it with what Roman itself did some
time ago, and it's the same.

So I guess this can be finally merged.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

scripts/kconfig/zconf.tab.c_shipped

@@ -1531,7 +1531,7 @@ yyreduce:
 
     {
 	menu_add_entry(NULL);
-	menu_add_prop(P_MENU, yyvsp[-1].string, NULL, NULL);
+	menu_add_prompt(P_MENU, yyvsp[-1].string, NULL);
 	printd(DEBUG_PARSE, "%s:%d:menu\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1586,7 +1586,7 @@ yyreduce:
 
     {
 	menu_add_entry(NULL);
-	menu_add_prop(P_COMMENT, yyvsp[-1].string, NULL, NULL);
+	menu_add_prompt(P_COMMENT, yyvsp[-1].string, NULL);
 	printd(DEBUG_PARSE, "%s:%d:comment\n", zconf_curname(), zconf_lineno());
 ;}
     break;
@@ -1640,7 +1640,7 @@ yyreduce:
   case 86:
 
     {
-	menu_add_prop(P_PROMPT, yyvsp[-1].string, NULL, yyvsp[0].expr);
+	menu_add_prompt(P_PROMPT, yyvsp[-1].string, yyvsp[0].expr);
 ;}
     break;
 
@@ -1925,7 +1925,7 @@ void conf_parse(const char *name)
 	sym_init();
 	menu_init();
 	modules_sym = sym_lookup("MODULES", 0);
-	rootmenu.prompt = menu_add_prop(P_MENU, "Linux Kernel Configuration", NULL, NULL);
+	rootmenu.prompt = menu_add_prompt(P_MENU, "Linux Kernel Configuration", NULL);
 
 	//zconfdebug = 1;
 	zconfparse();