i8253: Make pcspkr input driver use the shared i8253_lock

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: linux-input@vger.kernel.org
Link: http://lkml.kernel.org/r/20110601180610.453577265@duck.linux-mips.net


Signed-off-by: Thomas Gleixner <tglx@linutronix.de>