usb: gadget: f_rndis: fix an error code on allocation failure

This should be return -ENOMEM.  The current code returns successs.

Fixes: de7a8d2d ('usb: gadget: f_rndis: OS descriptors support')
Acked-by: NAndrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/gadget/f_rndis.c

@@ -687,7 +687,7 @@ rndis_bind(struct usb_configuration *c, struct usb_function *f)
 		f->os_desc_table = kzalloc(sizeof(*f->os_desc_table),
 					   GFP_KERNEL);
 		if (!f->os_desc_table)
-			return PTR_ERR(f->os_desc_table);
+			return -ENOMEM;
 		f->os_desc_n = 1;
 		f->os_desc_table[0].os_desc = &rndis_opts->rndis_os_desc;
 	}