platform/x86: fujitsu-laptop: break up complex loop condition

The loop condition in acpi_fujitsu_hotkey_release() includes an
assignment, a four-argument function call and a comparison, making it
hard to read.  Separate the assignment from the comparison to improve
readability.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Acked-by: Jonathan Woithe <jwoithe@just42.net>
Signed-off-by: Darren Hart <dvhart@linux.intel.com>

drivers/platform/x86/fujitsu-laptop.c

@@ -1059,11 +1059,13 @@ static void acpi_fujitsu_hotkey_release(void)
 	struct input_dev *input = fujitsu_hotkey->input;
 	int keycode, status;
 
-	while ((status = kfifo_out_locked(&fujitsu_hotkey->fifo,
+	while (true) {
+		status = kfifo_out_locked(&fujitsu_hotkey->fifo,
 					  (unsigned char *)&keycode,
 					  sizeof(keycode),
-					  &fujitsu_hotkey->fifo_lock))
-					  == sizeof(keycode)) {
+					  &fujitsu_hotkey->fifo_lock);
+		if (status != sizeof(keycode))
+			return;
 		input_report_key(input, keycode, 0);
 		input_sync(input);
 		vdbg_printk(FUJLAPTOP_DBG_TRACE,