isdn: hisax: hisax_fcpcipnp: constify pci_device_id.

pci_device_id are not supposed to change at runtime. All functions
working with pci_device_id provided by <linux/pci.h> work with
const pci_device_id. So mark the non-const structs as const.

File size before:
text data bss dec hex filename
5989 576 0 6565 19a5 isdn/hisax/hisax_fcpcipnp.o

File size After adding 'const':
text data bss dec hex filename
6085 480 0 6565 19a5 isdn/hisax/hisax_fcpcipnp.o

Signed-off-by: Arvind Yadav <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

drivers/isdn/hisax/hisax_fcpcipnp.c

···
 MODULE_AUTHOR("Kai Germaschewski <[e-mail]>/Karsten Keil <[e-mail]>");
 MODULE_DESCRIPTION("AVM Fritz!PCI/PnP ISDN driver");
 
-static struct pci_device_id fcpci_ids[] = {
+static const struct pci_device_id fcpci_ids[] = {
 	{ .vendor      = PCI_VENDOR_ID_AVM,
 	  .device      = PCI_DEVICE_ID_AVM_A1,
 	  .subvendor   = PCI_ANY_ID,