platform/x86: fujitsu-laptop: decrease indentation in acpi_fujitsu_bl_notify()

acpi_fujitsu_bl_notify() is pretty deeply nested, which hurts
readability.  Strip off one level of indentation by returning early when
the event code supplied as argument is not ACPI_FUJITSU_NOTIFY_CODE1.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-and-tested-by: Jonathan Woithe <jwoithe@just42.net>

drivers/platform/x86/fujitsu-laptop.c

@@ -795,8 +795,17 @@ static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 
 	input = fujitsu_bl->input;
 
-	switch (event) {
-	case ACPI_FUJITSU_NOTIFY_CODE1:
+	if (event != ACPI_FUJITSU_NOTIFY_CODE1) {
+		keycode = KEY_UNKNOWN;
+		vdbg_printk(FUJLAPTOP_DBG_WARN,
+			    "unsupported event [0x%x]\n", event);
+		input_report_key(input, keycode, 1);
+		input_sync(input);
+		input_report_key(input, keycode, 0);
+		input_sync(input);
+		return;
+	}
+
 	keycode = 0;
 	oldb = fujitsu_bl->brightness_level;
 	get_lcd_level();
@@ -823,13 +832,6 @@ static void acpi_fujitsu_bl_notify(struct acpi_device *device, u32 event)
 		}
 		keycode = KEY_BRIGHTNESSDOWN;
 	}
-		break;
-	default:
-		keycode = KEY_UNKNOWN;
-		vdbg_printk(FUJLAPTOP_DBG_WARN,
-			    "unsupported event [0x%x]\n", event);
-		break;
-	}
 
 	if (keycode != 0) {
 		input_report_key(input, keycode, 1);