The default SPL / TPL linker script is in the $(ARCH) directory. The
way we use this today works but isn't ideal. With an update to Kconfig
to re-sync with the Linux Kernel, we need to escape the '$' here so that
it will end up being evaluated by make.
Cc: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Masahiro Yamada <masahiroy@kernel.org>