mmc: vub300: fix an error code

This error path should return -EINVAL instead of success.

Fixes: 88095e7b ("mmc: Add new VUB300 USB-to-SD/SDIO/MMC driver")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/0769d30c-ad80-421b-bf5d-7d6f5d85604e@moroto.mountainSigned-off-by: Ulf Hansson <ulf.hansson@linaro.org>

drivers/mmc/host/vub300.c

@@ -2309,6 +2309,7 @@ static int vub300_probe(struct usb_interface *interface,
 		vub300->read_only =
 			(0x0010 & vub300->system_port_status.port_flags) ? 1 : 0;
 	} else {
+		retval = -EINVAL;
 		goto error5;
 	}
 	usb_set_intfdata(interface, vub300);