Do not compress PSP BIOS image when CBFS verification is enabled.
Otherwise when a file is added to CBFS, cbfstool is not able to find the
metadata hash anchor magic in the compressed PSP BIOS image.
BUG=b:227809919
TEST=Build and boot to OS in Skyrim with CBFS verification enabled for
both x86 and PSP verstage.
Change-Id: Iaed888b81d14ede77132ff48abcfbeb138c01ce4
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68136
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>