cbfs_map() can allocate memory, so cbfs_unmap() should be called before leaving the function. BUG=b:278264488 TEST=Built and run with additional debugs on Skyrim device to confirm that data are correctly unmapped Change-Id: Ibf7ba6842f42404ad8bb415f8e7fda10403cbe2e Signed-off-by: Grzegorz Bernacki <bernacki@google.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/74715 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Jakub Czapiga <jacz@semihalf.com> Reviewed-by: Tim Van Patten <timvp@google.com>