rename CFG_ macros to CONFIG_SYS

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/drivers/block/ata_piix.h b/drivers/block/ata_piix.h
index f9f0194..11885af 100644
--- a/drivers/block/ata_piix.h
+++ b/drivers/block/ata_piix.h
@@ -88,7 +88,7 @@
 #endif
 
 #ifdef DRV_DECL			/*Defines Driver Specific variables */
-struct sata_port port[CFG_SATA_MAXBUS];
+struct sata_port port[CONFIG_SYS_SATA_MAXBUS];
 #endif
 
 #endif /* __ATA_PIIX_H__ */