Keep clean copies of PSP and BIOS table. Refresh the working tables before they are filled with file names and other information at each iteration. Change-Id: Ie8339a4d66c38e02180cbf99e13914bfff66dc0f Signed-off-by: Zheng Bao <fishbaozi@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/73628 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>