doc: drop PPC BE from supported platforms
We've discussed this with the Power team within IBM and have agreement that we should drop Power Linux BE for Node version 8 as customers will be using Power Linux LE when using Node.js going forward.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows [commit guidelines]
Affected core subsystem(s)
doc