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/at91sam9x5ek_dataflash_defconfig b/configs/at91sam9x5ek_dataflash_defconfig
index 441a940..7c135cb 100644
--- a/configs/at91sam9x5ek_dataflash_defconfig
+++ b/configs/at91sam9x5ek_dataflash_defconfig
@@ -23,4 +23,5 @@
 CONFIG_SPI_FLASH_ATMEL=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
+CONFIG_LCD=y
 CONFIG_OF_LIBFDT=y