ide: constify struct ide_port_info

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

drivers/ide/pci/triflex.c

@@ -102,7 +102,7 @@ static void __devinit init_hwif_triflex(ide_hwif_t *hwif)
 	hwif->set_dma_mode = &triflex_set_mode;
 }
 
-static struct ide_port_info triflex_device __devinitdata = {
+static const struct ide_port_info triflex_device __devinitdata = {
 	.name		= "TRIFLEX",
 	.init_hwif	= init_hwif_triflex,
 	.enablebits	= {{0x80, 0x01, 0x01}, {0x80, 0x02, 0x02}},