For some reason when building SPL for ARMv8 with LTO, the relocation
information is not discarded.
Discard it explicitly in the linker script.
This fixes LTO build for imx8mm_venice_defconfig.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>