input: mouse/hil_ptr: semaphore cleanup

The usage of this "mutex" is non obvious and probably a completion in
some places. Make it a semaphore.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Dmitry Torokhov <dtor@mail.ru>

drivers/input/mouse/hil_ptr.c

@@ -270,7 +270,7 @@ static int hil_ptr_connect(struct serio *serio, struct serio_driver *driver)
 	serio_set_drvdata(serio, ptr);
 	ptr->serio = serio;
 
-	init_MUTEX_LOCKED(&ptr->sem);
+	semaphore_init_locked(&ptr->sem);
 
 	/* Get device info.  MLC driver supplies devid/status/etc. */
 	serio->write(serio, 0);