drivers/mtd: Move conditional compilation to Makefile

rename CFG_FLASH_CFI_DRIVER to CONFIG_FLASH_CFI_DRIVER

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/ms7750se.h b/include/configs/ms7750se.h
index bee0aab..4356a67 100644
--- a/include/configs/ms7750se.h
+++ b/include/configs/ms7750se.h
@@ -86,7 +86,7 @@
 #define CFG_RX_ETH_BUFFER	(8)
 
 #define CFG_FLASH_CFI
-#define CFG_FLASH_CFI_DRIVER
+#define CONFIG_FLASH_CFI_DRIVER
 #undef CFG_FLASH_CFI_BROKEN_TABLE
 #undef  CFG_FLASH_QUIET_TEST
 #define CFG_FLASH_EMPTY_INFO				/* print 'E' for empty sector on flinfo */