Input: synaptics-rmi4 - fix error return code in rmi_driver_probe()

Fix to return a negative error code from the input_register_device()
error handling case instead of 0, as done elsewhere in this function.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20200428134948.78343-1-weiyongjun1@huawei.com


Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>