USB: serial: pl2303: add device-id for HP GC device

commit 031f9664f8f9356cee662335bc56c93d16e75665 upstream.

This is adds a device id for HP LD381 which is a pl2303GC-base device.

Signed-off-by: Scott Chen <scott@labau.com.tw>
Cc: stable@vger.kernel.org
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>