kconfig: remove redundant (void *) cast in search_conf()

The (void *) cast is redundant because the last argument of
show_textbox_ext() is an opaque pointer.
Signed-off-by: NMasahiro Yamada <masahiroy@kernel.org>

scripts/kconfig/mconf.c

@@ -441,8 +441,7 @@ static void search_conf(void)
 		res = get_relations_str(sym_arr, &head);
 		set_subtitle();
 		dres = show_textbox_ext("Search Results", str_get(&res), 0, 0,
-					keys, &vscroll,
-					&hscroll, &update_text, (void *)
+					keys, &vscroll, &hscroll, &update_text,
 					&data);
 		again = false;
 		for (i = 0; i < JUMP_NB && keys[i]; i++)