gpiolib: Simplify error path in gpiod_get_index() when requesting GPIO

Simplify error path in the gpiod_get_index() when requesting a GPIO line by:
 - checking for error condition first
 - dropping redundant 'else'

As a result, decrease the indentation level for better readability.
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: NBartosz Golaszewski <brgl@bgdev.pl>

drivers/gpio/gpiolib.c

@@ -3933,20 +3933,19 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
 	 */
 	ret = gpiod_request(desc, con_id ?: devname);
 	if (ret) {
-		if (ret == -EBUSY && flags & GPIOD_FLAGS_BIT_NONEXCLUSIVE) {
-			/*
-			 * This happens when there are several consumers for
-			 * the same GPIO line: we just return here without
-			 * further initialization. It is a bit of a hack.
-			 * This is necessary to support fixed regulators.
-			 *
-			 * FIXME: Make this more sane and safe.
-			 */
-			dev_info(dev, "nonexclusive access to GPIO for %s\n", con_id ?: devname);
-			return desc;
-		} else {
+		if (!(ret == -EBUSY && flags & GPIOD_FLAGS_BIT_NONEXCLUSIVE))
 			return ERR_PTR(ret);
-		}
+
+		/*
+		 * This happens when there are several consumers for
+		 * the same GPIO line: we just return here without
+		 * further initialization. It is a bit of a hack.
+		 * This is necessary to support fixed regulators.
+		 *
+		 * FIXME: Make this more sane and safe.
+		 */
+		dev_info(dev, "nonexclusive access to GPIO for %s\n", con_id ?: devname);
+		return desc;
 	}
 
 	ret = gpiod_configure_flags(desc, con_id, lookupflags, flags);