ide: constify struct ide_port_info

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/generic.c b/drivers/ide/pci/generic.c
index 2d869ae..f44d708 100644
--- a/drivers/ide/pci/generic.c
+++ b/drivers/ide/pci/generic.c
@@ -67,7 +67,7 @@
 		.udma_mask	= ATA_UDMA6, \
 	}
 
-static struct ide_port_info generic_chipsets[] __devinitdata = {
+static const struct ide_port_info generic_chipsets[] __devinitdata = {
 	/*  0 */ DECLARE_GENERIC_PCI_DEV("Unknown",	0),
 
 	{	/* 1 */
@@ -123,7 +123,7 @@
  
 static int __devinit generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	struct ide_port_info *d = &generic_chipsets[id->driver_data];
+	const struct ide_port_info *d = &generic_chipsets[id->driver_data];
 	int ret = -ENODEV;
 
 	/* Don't use the generic entry unless instructed to do so */