[flashrom] [patch] board enable for ASUS P4P800-X (with erasing/writing SST SST49LF003A/B)

[Idwer Vollering]

Enable writing/erasing on the ASUS P4P800-X, tested by mindcat on IRC.
This board enable is inspired by the board enable for the ASUS P4P800-VM.

As a bonus, testin the erasing/writing functionality on the SST
SST49LF003A/B chip is now known to work.

Signed-off-by: Idwer Vollering 
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Before (r1205/v0.9.3):
Write report: http://paste.flashrom.org/view.php?id=465
Write report: http://paste.flashrom.org/view.php?id=466

After (r1285):
Erase report: http://paste.flashrom.org/view.php?id=467