[coreboot] Phoenix reassembly

[Myles Watson]

In the s2891 tutorial it shows phnxdeco producing a rom.scr file, which the
readme says will reassemble the BIOS.  The version I downloaded doesn't seem
to produce this file with the -xs or -x options.

What's the preferred way to get the BIOS out of the .wph file so that
flashrom can use it?

Thanks,
Myles