input: eeti_ts.c build error

Hi!

While building a kernel for an ARM board the following build error came across:

drivers/input/touchscreen/eeti_ts.c: In function 'eeti_ts_irq_active':
drivers/input/touchscreen/eeti_ts.c:65:2: error: implicit declaration of function 'irq_to_gpio' [-Werror=implicit-function-declaration]

.config is attached.
Happens on 3.4.4 and Linus's tree as of today.

Thanks,
//richard