imx27lite: Reenable MTD support on NOR flash.

The support for this was silently dropped by a configuration
split during the merge of the imx27lite board support in commit
864aa034 (cmd_mtdparts: Move to common
handling of FLASH devices via MTD layer).

Signed-off-by: Detlev Zundel <dzu@denx.de>

include/configs/imx27lite.h

@@ -145,6 +145,7 @@
 /*
  * MTD
  */
+#define CONFIG_FLASH_CFI_MTD
 #define CONFIG_MTD_DEVICE
 
 /*