[media] s5p-tv: Do not ignore regulator/clk API return values in sdo_drv.c

This patch fixes following compilation warning:
drivers/media/platform/s5p-tv/sdo_drv.c: In function ‘sdo_runtime_resume’:
drivers/media/platform/s5p-tv/sdo_drv.c:268:18: warning: ignoring return value of ‘regulator_enable’,
  declared with attribute warn_unused_result
drivers/media/platform/s5p-tv/sdo_drv.c:269:18: warning: ignoring return value of ‘regulator_enable’,
  declared with attribute warn_unused_result

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/platform/s5p-tv/sdo_drv.c

@@ -262,11 +262,21 @@ static int sdo_runtime_resume(struct device *dev)
 {
 	struct v4l2_subdev *sd = dev_get_drvdata(dev);
 	struct sdo_device *sdev = sd_to_sdev(sd);
+	int ret;
 
 	dev_info(dev, "resume\n");
-	clk_enable(sdev->sclk_dac);
-	regulator_enable(sdev->vdac);
-	regulator_enable(sdev->vdet);
+
+	ret = clk_enable(sdev->sclk_dac);
+	if (ret < 0)
+		return ret;
+
+	ret = regulator_enable(sdev->vdac);
+	if (ret < 0)
+		goto dac_clk_dis;
+
+	ret = regulator_enable(sdev->vdet);
+	if (ret < 0)
+		goto vdac_r_dis;
 
 	/* software reset */
 	sdo_write_mask(sdev, SDO_CLKCON, ~0, SDO_TVOUT_SW_RESET);
@@ -285,6 +295,12 @@ static int sdo_runtime_resume(struct device *dev)
 		SDO_COMPENSATION_CVBS_COMP_OFF);
 	sdo_reg_debug(sdev);
 	return 0;
+
+vdac_r_dis:
+	regulator_disable(sdev->vdac);
+dac_clk_dis:
+	clk_disable(sdev->sclk_dac);
+	return ret;
 }
 
 static const struct dev_pm_ops sdo_pm_ops = {