test: Enable basic hashes in EFI FIT images

We currently have a problem with crc32 checksums in FIT images now
failing, and we did not catch this as it doesn't show up in sandbox nor
do we have FIT image tests today that enable crc32.  Rectify this by
enabling CRC32 hashes in the EFI FIT tests, as these are always run in
CI.

Signed-off-by: Tom Rini <trini@konsulko.com>