CONFIG_SCSI_FD_8xx no longer exists.

Apparently it was renamed to CONFIG_SCSI_SEAGATE, but the Makefile was
not correctly updated.
Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NJames Bottomley <James.Bottomley@SteelEye.com>