staging: comedi: hwdrv_apci1564: tidy up apci1564_timer_insn_write()

Clear the gate and trig bits in the common code path.
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Reviewed-by: Ian Abbott <abbotti@mev.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/addi-data/hwdrv_apci1564.c

@@ -60,13 +60,12 @@ static int apci1564_timer_insn_write(struct comedi_device *dev,
 	unsigned int ctrl;
 
 	ctrl = inl(devpriv->timer + ADDI_TCW_CTRL_REG);
+	ctrl &= ~(ADDI_TCW_CTRL_GATE | ADDI_TCW_CTRL_TRIG);
 	switch (data[1]) {
 	case 0:	/* Stop The Timer */
-		ctrl &= ~(ADDI_TCW_CTRL_GATE | ADDI_TCW_CTRL_TRIG |
-			  ADDI_TCW_CTRL_ENA);
+		ctrl &= ~ADDI_TCW_CTRL_ENA;
 		break;
 	case 1:	/* Enable the Timer */
-		ctrl &= ~(ADDI_TCW_CTRL_GATE | ADDI_TCW_CTRL_TRIG);
 		ctrl |= ADDI_TCW_CTRL_ENA;
 		break;
 	}