OMAPDSS: VENC: Check for errors from regulator_enable()

It is possible for regulator_enable() to fail and if it does fail that's
generally a bad sign for anything we try to do with the hardware afterwards
so check for and immediately return an error if regulator_enable() fails.

Signed-off-by: Mark Brown <redacted>
---
 drivers/video/omap2/dss/venc.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/video/omap2/dss/venc.c b/drivers/video/omap2/dss/venc.c
index 9c3daf7..abfbd4a 100644
--- a/drivers/video/omap2/dss/venc.c
+++ b/drivers/video/omap2/dss/venc.c

@@ -443,7 +443,9 @@ static int venc_power_on(struct omap_dss_device *dssdev)
 	dispc_set_digit_size(dssdev->panel.timings.x_res,
 			dssdev->panel.timings.y_res/2);
 
-	regulator_enable(venc.vdda_dac_reg);
+	r = regulator_enable(venc.vdda_dac_reg);
+	if (r)
+		goto err;
 
 	if (dssdev->platform_enable)
 		dssdev->platform_enable(dssdev);