Convert CONFIG_NAND_LPC32XX_MLC to Kconfig

This converts the following to Kconfig:
   CONFIG_NAND_LPC32XX_MLC

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/work_92105_defconfig b/configs/work_92105_defconfig
index b09c855..d67ec05 100644
--- a/configs/work_92105_defconfig
+++ b/configs/work_92105_defconfig
@@ -54,6 +54,7 @@
 # CONFIG_MMC is not set
 CONFIG_MTD=y
 CONFIG_MTD_RAW_NAND=y
+CONFIG_NAND_LPC32XX_MLC=y
 CONFIG_PHYLIB=y
 CONFIG_PHY_ADDR_ENABLE=y
 CONFIG_PHY_SMSC=y