efi_loader: use INCLUDE in EFI linker scripts

Except for the architecture specific lines ARM and RISC-V can use the same
linker script. Move the common lines to an include.

Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
4 files changed