[coreboot] [PATCH] flashrom: Drop duplicate write_39sf020()

[Uwe Hermann]

See patch.

We should also rename w49f002u.c in another patch to something more
generic, that code is in no way specific to the w49f002u. Maybe
even put the only function in that file (byte-wise JEDEC writes of one
page/sector) into jedec.c?

Uwe.