Convert CONFIG_LCD to Kconfig

This converts the following to Kconfig:
   CONFIG_LCD

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Jagan Teki <jteki@openedev.com>
diff --git a/configs/at91sam9rlek_mmc_defconfig b/configs/at91sam9rlek_mmc_defconfig
index d7214f2..69cd1d9 100644
--- a/configs/at91sam9rlek_mmc_defconfig
+++ b/configs/at91sam9rlek_mmc_defconfig
@@ -18,4 +18,5 @@
 # CONFIG_CMD_NET is not set
 # CONFIG_CMD_NFS is not set
 CONFIG_CMD_FAT=y
+CONFIG_LCD=y
 CONFIG_OF_LIBFDT=y