staging: me_daq: use schedule_timeout_interruptible()

API consolidation with coccinelle found:
./drivers/staging/comedi/drivers/me_daq.c:177:1-17:
        consolidation with schedule_timeout_*() recommended

This is a 1:1 conversion of the current calls to an available helper
only - so only an API consolidation to improve readability.
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/me_daq.c

@@ -173,8 +173,7 @@ struct me_private_data {
 
 static inline void sleep(unsigned sec)
 {
-	__set_current_state(TASK_INTERRUPTIBLE);
-	schedule_timeout(sec * HZ);
+	schedule_timeout_interruptible(sec * HZ);
 }
 
 static int me_dio_insn_config(struct comedi_device *dev,