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/at91sam9261ek_nandflash_defconfig b/configs/at91sam9261ek_nandflash_defconfig
index 17d0fdd..229da6d 100644
--- a/configs/at91sam9261ek_nandflash_defconfig
+++ b/configs/at91sam9261ek_nandflash_defconfig
@@ -18,4 +18,5 @@
 CONFIG_CMD_FAT=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
+CONFIG_LCD=y
 CONFIG_OF_LIBFDT=y