drm/tilcdc: Fix an incorrect condition

Instead of checking if num_encoders is zero, it is being assigned 0.
Convert the assignment to a check.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
index c5b592dc..bfac582 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
@@ -75,7 +75,7 @@
 		mod->funcs->modeset_init(mod, dev);
 	}
 
-	if ((priv->num_encoders = 0) || (priv->num_connectors == 0)) {
+	if ((priv->num_encoders == 0) || (priv->num_connectors == 0)) {
 		/* oh nos! */
 		dev_err(dev->dev, "no encoders/connectors found\n");
 		return -ENXIO;