staging: comedi: vmk80xx: remove subdevice pointer math

Convert the comedi_subdevice access from pointer math to array
access.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/vmk80xx.c

@@ -1119,15 +1119,15 @@ static int vmk80xx_attach_common(struct comedi_device *cdev,
 		return ret;
 	}
 	/* Analog input subdevice */
-	s = cdev->subdevices + VMK80XX_SUBD_AI;
+	s = &cdev->subdevices[VMK80XX_SUBD_AI];
 	s->type = COMEDI_SUBD_AI;
 	s->subdev_flags = SDF_READABLE | SDF_GROUND;
 	s->n_chan = dev->board.ai_chans;
 	s->maxdata = (1 << dev->board.ai_bits) - 1;
 	s->range_table = dev->board.range;
 	s->insn_read = vmk80xx_ai_rinsn;
 	/* Analog output subdevice */
-	s = cdev->subdevices + VMK80XX_SUBD_AO;
+	s = &cdev->subdevices[VMK80XX_SUBD_AO];
 	s->type = COMEDI_SUBD_AO;
 	s->subdev_flags = SDF_WRITEABLE | SDF_GROUND;
 	s->n_chan = dev->board.ao_chans;
@@ -1139,15 +1139,15 @@ static int vmk80xx_attach_common(struct comedi_device *cdev,
 		s->insn_read = vmk80xx_ao_rinsn;
 	}
 	/* Digital input subdevice */
-	s = cdev->subdevices + VMK80XX_SUBD_DI;
+	s = &cdev->subdevices[VMK80XX_SUBD_DI];
 	s->type = COMEDI_SUBD_DI;
 	s->subdev_flags = SDF_READABLE | SDF_GROUND;
 	s->n_chan = dev->board.di_chans;
 	s->maxdata = 1;
 	s->insn_read = vmk80xx_di_rinsn;
 	s->insn_bits = vmk80xx_di_bits;
 	/* Digital output subdevice */
-	s = cdev->subdevices + VMK80XX_SUBD_DO;
+	s = &cdev->subdevices[VMK80XX_SUBD_DO];
 	s->type = COMEDI_SUBD_DO;
 	s->subdev_flags = SDF_WRITEABLE | SDF_GROUND;
 	s->n_chan = dev->board.do_chans;
@@ -1159,7 +1159,7 @@ static int vmk80xx_attach_common(struct comedi_device *cdev,
 		s->insn_read = vmk80xx_do_rinsn;
 	}
 	/* Counter subdevice */
-	s = cdev->subdevices + VMK80XX_SUBD_CNT;
+	s = &cdev->subdevices[VMK80XX_SUBD_CNT];
 	s->type = COMEDI_SUBD_COUNTER;
 	s->subdev_flags = SDF_READABLE;
 	s->n_chan = dev->board.cnt_chans;
@@ -1172,7 +1172,7 @@ static int vmk80xx_attach_common(struct comedi_device *cdev,
 	}
 	/* PWM subdevice */
 	if (dev->board.model == VMK8061_MODEL) {
-		s = cdev->subdevices + VMK80XX_SUBD_PWM;
+		s = &cdev->subdevices[VMK80XX_SUBD_PWM];
 		s->type = COMEDI_SUBD_PWM;
 		s->subdev_flags = SDF_READABLE | SDF_WRITEABLE;
 		s->n_chan = dev->board.pwm_chans;