ide: constify struct ide_port_info

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/pci/aec62xx.c b/drivers/ide/pci/aec62xx.c
index b2dd8ce..19ec421 100644
--- a/drivers/ide/pci/aec62xx.c
+++ b/drivers/ide/pci/aec62xx.c
@@ -194,7 +194,7 @@
 	}
 }
 
-static struct ide_port_info aec62xx_chipsets[] __devinitdata = {
+static const struct ide_port_info aec62xx_chipsets[] __devinitdata = {
 	{	/* 0 */
 		.name		= "AEC6210",
 		.init_chipset	= init_chipset_aec62xx,