kconfig: remove redundant input_mode test for check_conf() loop

check_conf() never increments conf_cnt for listnewconfig, so conf_cnt
is always zero.

In other words, conf_cnt is not zero, "input_mode != listnewconfig"
is met.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: Ulf Magnusson <ulfalizer@gmail.com>

scripts/kconfig/conf.c

@@ -669,7 +669,7 @@ int main(int ac, char **av)
 		do {
 			conf_cnt = 0;
 			check_conf(&rootmenu);
-		} while (conf_cnt && input_mode != listnewconfig);
+		} while (conf_cnt);
 		break;
 	case olddefconfig:
 	default: