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/pm9261_defconfig b/configs/pm9261_defconfig
index f9a59a60..f9e53c7 100644
--- a/configs/pm9261_defconfig
+++ b/configs/pm9261_defconfig
@@ -17,3 +17,4 @@
 CONFIG_CMD_CACHE=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y
+CONFIG_LCD=y