If we switch to CONFIG_TIMER, we don't need the legacy timer macros and functions anymore. Add the proper guards to exclude them from compiling. Cc: Pali Rohár <pali@kernel.org> Signed-off-by: Michael Walle <michael@walle.cc> Reviewed-by: Pali Rohár <pali@kernel.org> Reviewed-by: Stefan Roese <sr@denx.de>