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/peach-pi_defconfig b/configs/peach-pi_defconfig
index e5f34a1..df160ae 100644
--- a/configs/peach-pi_defconfig
+++ b/configs/peach-pi_defconfig
@@ -67,5 +67,6 @@
 CONFIG_DISPLAY=y
 CONFIG_VIDEO_BRIDGE=y
 CONFIG_VIDEO_BRIDGE_PARADE_PS862X=y
+CONFIG_LCD=y
 CONFIG_TPM=y
 CONFIG_ERRNO_STR=y