gpio: promote own request failure to pr_err()

These error messages are helpful to see that we fail to get
hogs. Promote them to real errors so they appear in the boot
crawl.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpiolib.c

@@ -2131,13 +2131,13 @@ int gpiod_hog(struct gpio_desc *desc, const char *name,
 
 	local_desc = gpiochip_request_own_desc(chip, hwnum, name);
 	if (IS_ERR(local_desc)) {
-		pr_debug("requesting own GPIO %s failed\n", name);
+		pr_err("requesting own GPIO %s failed\n", name);
 		return PTR_ERR(local_desc);
 	}
 
 	status = gpiod_configure_flags(desc, name, lflags, dflags);
 	if (status < 0) {
-		pr_debug("setup of GPIO %s failed\n", name);
+		pr_err("setup of GPIO %s failed\n", name);
 		gpiochip_free_own_desc(desc);
 		return status;
 	}