platform/x86: asus-wmi: Drop indentation level by inverting conditionals

We have extra indentation level where it can be avoided by changing conditional
to the inverted one.

Do it here for three such locations in the driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/asus-wmi.c

@@ -445,15 +445,14 @@ static int kbd_led_read(struct asus_wmi *asus, int *level, int *env)
 	if (retval == 0x8000)
 		retval = 0;
 
-	if (retval >= 0) {
-		if (level)
-			*level = retval & 0x7F;
-		if (env)
-			*env = (retval >> 8) & 0x7F;
-		retval = 0;
-	}
+	if (retval < 0)
+		return retval;
 
-	return retval;
+	if (level)
+		*level = retval & 0x7F;
+	if (env)
+		*env = (retval >> 8) & 0x7F;
+	return 0;
 }
 
 static void do_kbd_led_set(struct led_classdev *led_cdev, int value)
@@ -767,16 +766,14 @@ static int asus_register_rfkill_notifier(struct asus_wmi *asus, char *node)
 	acpi_handle handle;
 
 	status = acpi_get_handle(NULL, node, &handle);
-
-	if (ACPI_SUCCESS(status)) {
-		status = acpi_install_notify_handler(handle,
-						     ACPI_SYSTEM_NOTIFY,
-						     asus_rfkill_notify, asus);
-		if (ACPI_FAILURE(status))
-			pr_warn("Failed to register notify on %s\n", node);
-	} else
+	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
+	status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+					     asus_rfkill_notify, asus);
+	if (ACPI_FAILURE(status))
+		pr_warn("Failed to register notify on %s\n", node);
+
 	return 0;
 }
 
@@ -786,15 +783,13 @@ static void asus_unregister_rfkill_notifier(struct asus_wmi *asus, char *node)
 	acpi_handle handle;
 
 	status = acpi_get_handle(NULL, node, &handle);
+	if (ACPI_FAILURE(status))
+		return;
 
-	if (ACPI_SUCCESS(status)) {
-		status = acpi_remove_notify_handler(handle,
-						    ACPI_SYSTEM_NOTIFY,
-						    asus_rfkill_notify);
-		if (ACPI_FAILURE(status))
-			pr_err("Error removing rfkill notify handler %s\n",
-			       node);
-	}
+	status = acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+					    asus_rfkill_notify);
+	if (ACPI_FAILURE(status))
+		pr_err("Error removing rfkill notify handler %s\n", node);
 }
 
 static int asus_get_adapter_status(struct hotplug_slot *hotplug_slot,