Recognize Applied Micro as an Implementor and X-Gene as a PartNum for
processor identification purposes. Use the name instead of the ID as
the sentinel in the various tables since X-Gene has PartNum zero.
Note that this means Ampere eMAG gets recognized as Applied Micro
X-Gene r3p2. That makes sense as the CPU started its life as X-Gene 3.
Apparently future Ampere parts will use the new Ampere Implementer ID.