hammerhead/mimc200: Use CONFIG_FLASH_CFI_DRIVER

CFG_FLASH_CFI_DRIVER was recently renamed CONFIG_FLASH_CFI_DRIVER.

Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com>
diff --git a/include/configs/hammerhead.h b/include/configs/hammerhead.h
index 8e83daa..c44d62e 100644
--- a/include/configs/hammerhead.h
+++ b/include/configs/hammerhead.h
@@ -129,7 +129,7 @@
 #define CONFIG_NR_DRAM_BANKS		1
 
 #define CFG_FLASH_CFI			1
-#define CFG_FLASH_CFI_DRIVER		1
+#define CONFIG_FLASH_CFI_DRIVER		1
 
 #define CFG_FLASH_BASE			0x00000000
 #define CFG_FLASH_SIZE			0x800000