docs: mips: add to the documentation body as ReST

Manually convert the AU1xxx_IDE.README file to ReST and add
to a MIPS book as part of the main documentation body.

Signed-off-by: Mauro Carvalho Chehab <[email protected]>
Acked-by: Paul Burton <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
3 files changed