drm/msm/dp: drop modeset sanity checks

Drop the overly defensive modeset sanity checks of function parameters
which have already been checked or used by the callers.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Tested-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Kuogee Hsieh <quic_khsieh@quicinc.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/502674/
Link: https://lore.kernel.org/r/20220913085320.8577-10-johan+linaro@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

drivers/gpu/drm/msm/dp/dp_display.c

@@ -1600,20 +1600,10 @@ static int dp_display_get_next_bridge(struct msm_dp *dp)
 int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
 			struct drm_encoder *encoder)
 {
-	struct msm_drm_private *priv;
+	struct msm_drm_private *priv = dev->dev_private;
 	struct dp_display_private *dp_priv;
 	int ret;
 
-	if (WARN_ON(!encoder) || WARN_ON(!dp_display) || WARN_ON(!dev))
-		return -EINVAL;
-
-	priv = dev->dev_private;
-
-	if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) {
-		DRM_DEV_ERROR(dev->dev, "too many bridges\n");
-		return -ENOSPC;
-	}
-
 	dp_display->drm_dev = dev;
 
 	dp_priv = container_of(dp_display, struct dp_display_private, dp_display);