pinctrl: nomadik: fix dereference of error pointer

If nmk_gpio_populate_chip() returns an error, avoid deferencing its
return value.
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/linux-gpio/5ee722f8-7582-420d-8477-45be6acde90f@moroto.mountain/Signed-off-by: Théo Lebrun <theo.lebrun@bootlin.com>
Link: https://lore.kernel.org/r/20240306-mbly-gpio-err-fix-v1-1-a3605ba2336f@bootlin.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/pinctrl/nomadik/pinctrl-nomadik.c

@@ -1228,9 +1228,10 @@ static int nmk_pinctrl_probe(struct platform_device *pdev)
 		if (IS_ERR(nmk_chip))
 			dev_err(&pdev->dev,
 				"could not populate nmk chip struct - continue anyway\n");
+		else
+			/* We are NOT compatible with mobileye,eyeq5-gpio. */
+			BUG_ON(nmk_chip->is_mobileye_soc);
 		fwnode_handle_put(gpio_fwnode);
-		/* We are NOT compatible with mobileye,eyeq5-gpio. */
-		BUG_ON(nmk_chip->is_mobileye_soc);
 	}
 
 	prcm_fwnode = fwnode_find_reference(fwnode, "prcm", 0);