Input: analog - fix formatting of error code

The location of the minus sign and the error code are
linked together for better human view.

Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Link: https://lore.kernel.org/r/20201027135020.66632-1-zhangqilong3@huawei.com


Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>