fwu: fix config FWU_MULTI_BANK_UPDATE

Symbol CONFIG_EFI_SETUP_EARLY does not exist anymore.

CONFIG_FWU_MULTI_BANK_UPDATE without CONFIG_FWU_MDATA results in

    lib/fwu_updates/fwu.c:49: undefined reference to `fwu_get_mdata'

Fixes: 86794052 ("FWU: Add support for the FWU Multi Bank Update feature")
Fixes: 023d9c93 ("efi_loader: remove CONFIG_EFI_SETUP_EARLY")
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Acked-by: Sughosh Ganu <sughosh.ganu@linaro.org>