serial: support for InstaShield IS-400 four port RS-232 PCI card

Add support for the InstaShield IS-400 four port RS-232 PCI card.

Signed-off-by: Ignacio García Pérez <iggarpe@t2i.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/pci_ids.h b/include/linux/pci_ids.h
index 342b55a..9b940e6 100644
--- a/include/linux/pci_ids.h
+++ b/include/linux/pci_ids.h
@@ -1761,6 +1761,7 @@
 
 #define PCI_VENDOR_ID_INTASHIELD	0x135a
 #define PCI_DEVICE_ID_INTASHIELD_IS200	0x0d80
+#define PCI_DEVICE_ID_INTASHIELD_IS400	0x0dc0
 
 #define PCI_VENDOR_ID_QUATECH		0x135C
 #define PCI_DEVICE_ID_QUATECH_QSC100	0x0010