I han't had a chance to test it yet but I think if I just modify flashchips.c to say this it may work:
{"M50FW080", ST_ID, ST_M50FW080, 1024, 64 * 1024, probe_jedec, erase_lhf00l04, write_lhf00l04},
I will test it and report back, with a patch hopefully?
Thanks - Joe