Update:

> The PPC-based SoCs remain at Macom, apparently: [...]

They have since found their new home on the Macom website:

https://www.macom.com/products/network-connectivity-solutions/Embedded%20Processors
https://www.macom.com/files/live/sites/ma/files/contributed/support/Connectivity%20and%20Embedded%20EOL%20products3.pdf


Edit:
01/2019 notice on discontinuation of PPC405EX(r), PPC460EX(r) and PPC460GT

[ Edited by Andreas_Wolf 11.11.2019 - 10:16 ]