tty: isicom: 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
12176 1520 25864 39560 9a88 drivers/tty/isicom.o

File size After adding 'const':
text data bss dec hex filename
12528 1168 25864 39560 9a88 drivers/tty/isicom.o

Signed-off-by: Arvind Yadav <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/tty/isicom.c

···
 static int isicom_probe(struct pci_dev *, const struct pci_device_id *);
 static void isicom_remove(struct pci_dev *);
 
-static struct pci_device_id isicom_pci_tbl[] = {
+static const struct pci_device_id isicom_pci_tbl[] = {
 	{ PCI_DEVICE(VENDOR_ID, 0x2028) },
 	{ PCI_DEVICE(VENDOR_ID, 0x2051) },
 	{ PCI_DEVICE(VENDOR_ID, 0x2052) },