Make mpegplayer sleep the disk after buffering to save battery. * Add a simulator stub for ata_sleep(), and un-ifdef most calls to it.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17096 a1c6a512-1295-4272-9138-f99709370657

apps/buffering.c

@@ -813,11 +813,9 @@ static bool fill_buffer(void)
     }
     else
     {
-#ifndef SIMULATOR
         /* only spin the disk down if the filling wasn't interrupted by an
            event arriving in the queue. */
         ata_sleep();
-#endif
         return false;
     }
 }