Input: ucb1400_ts - use schedule_timeout_uninterruptible

Given that the code is not checking for signals it should
use uninterruptible sleep.

Signed-off-by: Rene Herman <rene.herman@gmail.com>
Acked-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/touchscreen/ucb1400_ts.c

@@ -130,8 +130,7 @@ static unsigned int ucb1400_adc_read(struct ucb1400 *ucb, u16 adc_channel)
 		if (val & UCB_ADC_DAT_VALID)
 			break;
 		/* yield to other processes */
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(1);
+		schedule_timeout_uninterruptible(1);
 	}
 
 	return UCB_ADC_DAT_VALUE(val);