serial: add support for Korenix JetCard

Add different model (with a different PCI ID) to support Korenix JetCard.

Signed-off-by: Kiros Yeh <kiros@korenix.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>