Input: make PCI device ids constant

The id_table field of the struct pci_driver is constant in <linux/pci.h>
so it makes sense to mark initialization data also constant.

Signed-off-by: Márton Németh <nm127@freemail.hu>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/serio/pcips2.c b/drivers/input/serio/pcips2.c
index 1dacbe0..797314b 100644
--- a/drivers/input/serio/pcips2.c
+++ b/drivers/input/serio/pcips2.c
@@ -186,7 +186,7 @@
 	pci_disable_device(dev);
 }
 
-static struct pci_device_id pcips2_ids[] = {
+static const struct pci_device_id pcips2_ids[] = {
 	{
 		.vendor		= 0x14f2,	/* MOBILITY */
 		.device		= 0x0123,	/* Keyboard */