When CONFIG_LP_MULTIBOOT is enabled, save the values of EAX and EBX passed from the bootloader. This information can be useful for multiboot payloads feature alone. Change-Id: I98c2cd00206ee48eb0fc67edd9533032bcf3e5eb Signed-off-by: Subrata Banik <subratabanik@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/82040 Reviewed-by: Kapil Porwal <kapilporwal@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Lean Sheng Tan <sheng.tan@9elements.com> Reviewed-by: Dinesh Gehlot <digehlot@google.com>