pinctrl: iproc-gpio: Remove redundant error printing in iproc_gpio_probe()

When devm_ioremap_resource() fails, a clear enough error message will be
printed by its subfunction __devm_ioremap_resource(). The error
information contains the device name, failure cause, and possibly resource
information.

Therefore, remove the error printing here to simplify code and reduce the
binary size.

Reported-by: Hulk Robot <[e-mail]>
Signed-off-by: Zhen Lei <[e-mail]>
Acked-by: Ray Jui <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Linus Walleij <[e-mail]>

drivers/pinctrl/bcm/pinctrl-iproc-gpio.c

···
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
 	if (res) {
 		chip->io_ctrl = devm_ioremap_resource(dev, res);
-		if (IS_ERR(chip->io_ctrl)) {
-			dev_err(dev, "unable to map I/O memory\n");
+		if (IS_ERR(chip->io_ctrl))
 			return PTR_ERR(chip->io_ctrl);
-		}
 		if (of_device_is_compatible(dev->of_node,
 					    "brcm,cygnus-ccm-gpio"))
 			io_ctrl_type = IOCTRL_TYPE_CDRU;