kconfig: Move CONFIG_OF_LIBFDT to Kconfig
This patch follows work done by:
"Move CONFIG_OF_LIBFDT to Kconfig"
(sha1: 69e173eb57d1f4848f070c83456096ba5d2ba1b4)
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
[trini: Add xpress* to the patch]
Signed-off-by: Tom Rini <trini@konsulko.com>