memstick: r592: Fix error return in r592_probe()

Fix to return a error code from the error handling case instead of 0.

Fixes: 92634125

 ("memstick: add driver for Ricoh R5C592 card reader")
Signed-off-by: Jing Xiangfeng <jingxiangfeng@huawei.com>
Link: https://lore.kernel.org/r/20201125014718.153563-1-jingxiangfeng@huawei.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>