ide: constify struct ide_port_info

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

drivers/ide/pci/cmd64x.c

@@ -548,7 +548,7 @@ static void __devinit init_hwif_cmd64x(ide_hwif_t *hwif)
 	}
 }
 
-static struct ide_port_info cmd64x_chipsets[] __devinitdata = {
+static const struct ide_port_info cmd64x_chipsets[] __devinitdata = {
 	{	/* 0 */
 		.name		= "CMD643",
 		.init_chipset	= init_chipset_cmd64x,