flashchips: Drop dead code of AT26DF321

The definition for the AT26DF321 has been commented out since it was
first added in 2008. The chip now appears to be obsolete, being marked
"obsolete" and unstocked at Digikey. It is also only referred to in
historical documents on the manufacturer's website (microchip.com).

To avoid further bitrot of this dead code, drop it.

Signed-off-by: Alan Green <avg@google.com>
Change-Id: Ib30b3a16f25de5def508d90ec9375563b1d4d384
Reviewed-on: https://review.coreboot.org/c/flashrom/+/33836
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
2 files changed