drm: ipuv3: fix missing ret

Add back the ret variable which was removed during the v5.4.59 merge by
accident.

This fixes a build failure for devices enabling drm/imx/ipuv3.

Signed-off-by: Ricardo Salveti <ricardo@foundries.io>

drivers/gpu/drm/imx/ipuv3/ipuv3-crtc.c

@@ -439,6 +439,7 @@ static int ipu_drm_bind(struct device *dev, struct device *master, void *data)
 	struct ipu_client_platformdata *pdata = dev->platform_data;
 	struct drm_device *drm = data;
 	struct ipu_crtc *ipu_crtc;
+	int ret;
 
 	ipu_crtc = dev_get_drvdata(dev);
 	memset(ipu_crtc, 0, sizeof(*ipu_crtc));