drm/bridge: analogix-anx78xx: clean up drm_bridge_add call

This patch removes unnecessary checking of return value.
Signed-off-by: NInki Dae <inki.dae@samsung.com>
Signed-off-by: NArchit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1499071350-25168-4-git-send-email-inki.dae@samsung.com

drivers/gpu/drm/bridge/analogix-anx78xx.c

@@ -1438,11 +1438,7 @@ static int anx78xx_i2c_probe(struct i2c_client *client,
 
 	anx78xx->bridge.funcs = &anx78xx_bridge_funcs;
 
-	err = drm_bridge_add(&anx78xx->bridge);
-	if (err < 0) {
-		DRM_ERROR("Failed to add drm bridge: %d\n", err);
-		goto err_poweroff;
-	}
+	drm_bridge_add(&anx78xx->bridge);
 
 	/* If cable is pulled out, just poweroff and wait for HPD event */
 	if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd))