[flashrom] Patch for "LE25FW406A"

[The Raven]

Here is a Patch (r1791) for adding "LE25FW406A".

Tested:
Probe -> Probing for Sanyo LE25FW406A, 512 kB: probe_spi_res2: id1 0x62,
id2 0x1a
Read -> ok
Erase -> ok
Write -> 512kb random data ok
Verify -> ok

It also adds "/* Sanyo */" description to the Sanyo-Chips. This is only
a cosmetic thing.