staging: tidspbridge: fix error return code in omap34_xx_bridge_probe()

Fix to return a negative error code in the class_create() error
handling case instead of 0, as done elsewhere in this function.
Signed-off-by: NWei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/tidspbridge/rmgr/drv_interface.c

@@ -508,6 +508,7 @@ static int omap34_xx_bridge_probe(struct platform_device *pdev)
 	bridge_class = class_create(THIS_MODULE, "ti_bridge");
 	if (IS_ERR(bridge_class)) {
 		pr_err("%s: Error creating bridge class\n", __func__);
+		err = PTR_ERR(bridge_class);
 		goto err3;
 	}