ppdev: Add an error check in register_device

In the Linux kernel, the following vulnerability has been resolved:

ppdev: Add an error check in register_device

In register_device, the return value of ida_simple_get is unchecked,

in witch ida_simple_get will use an invalid index value.

To address this issue, index should be checked after ida_simple_get. When

the index value is abnormal, a warning message should be printed, the port

should be dropped, and the value should be recorded.