HID: pidff: fix error return code in hid_pidff_init()

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

Fixes: 224ee88f

 ("Input: add force feedback driver for PID devices")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>