pinctrl: ti: fix error return code of ti_iodelay_probe()

When ti_iodelay_pinconf_init_dev() fails, no error return code of
ti_iodelay_probe() is assigned.
To fix this bug, ret is assigned with the return value of
ti_iodelay_pinconf_init_dev(), and then ret is checked.
Reported-by: TOTE Robot <oslab@tsinghua.edu.cn>
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Link: https://lore.kernel.org/r/20210306125122.15043-1-baijiaju1990@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/ti/pinctrl-ti-iodelay.c

@@ -867,7 +867,8 @@ static int ti_iodelay_probe(struct platform_device *pdev)
 		goto exit_out;
 	}
 
-	if (ti_iodelay_pinconf_init_dev(iod))
+	ret = ti_iodelay_pinconf_init_dev(iod);
+	if (ret)
 		goto exit_out;
 
 	ret = ti_iodelay_alloc_pins(dev, iod, res->start);