drivers/block: Move conditional compilation to Makefile

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/sc520_cdp.h b/include/configs/sc520_cdp.h
index 0e830b8..e29655e 100644
--- a/include/configs/sc520_cdp.h
+++ b/include/configs/sc520_cdp.h
@@ -178,7 +178,7 @@
 #define CFG_SATA_MAXBUS         2       /*Max Sata buses supported */
 #define CFG_SATA_DEVS_PER_BUS   2      /*Max no. of devices per bus/port */
 #define CFG_SATA_MAX_DEVICE     (CFG_SATA_MAXBUS* CFG_SATA_DEVS_PER_BUS)
-#define CFG_ATA_PIIX            1       /*Supports ata_piix driver */
+#define CONFIG_ATA_PIIX		1       /*Supports ata_piix driver */
 
 /************************************************************
  * DISK Partition support