greybus: loopback: ensure sysfs entries are cleaned up on exit

bdd4bba4 ('greybus/loopback: add module level sys/debug fs data points')
added a sysfs entry attached to gb_dev but missed the jump to out_sysfs_dev
This patchs fixes the missing jump to out_sysfs_dev.
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Reported-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>

drivers/staging/greybus/loopback.c

@@ -873,7 +873,7 @@ static int gb_loopback_connection_init(struct gb_connection *connection)
 		if (gb_dev.size_max <=
 			sizeof(struct gb_loopback_transfer_request)) {
 			retval = -EINVAL;
-			goto out_sysfs;
+			goto out_sysfs_dev;
 		}
 		gb_dev.size_max -= sizeof(struct gb_loopback_transfer_request);
 	}