Input: add ixp4xx beeper driver

This is a driver for beeper found in LinkSys NSLU2 boxes. It should work
on any ixp4xx based platform.

Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/misc/Makefile b/drivers/input/misc/Makefile
index ce44cce..184c412 100644
--- a/drivers/input/misc/Makefile
+++ b/drivers/input/misc/Makefile
@@ -11,3 +11,4 @@
 obj-$(CONFIG_INPUT_UINPUT)		+= uinput.o
 obj-$(CONFIG_INPUT_WISTRON_BTNS)	+= wistron_btns.o
 obj-$(CONFIG_HP_SDC_RTC)		+= hp_sdc_rtc.o
+obj-$(CONFIG_INPUT_IXP4XX_BEEPER)	+= ixp4xx-beeper.o