There is no machine that uses Motorola MCP750 (aka Raven) model.
Drop the related codes.
While we are here, drop the mentioning of Intel GW80314 I/O
companion chip in the comments as it has been obsolete for years,
and correct a typo too.
Signed-off-by: Bin Meng <bin.meng@windriver.com>
Message-Id: <20210918032653.646370-2-bin.meng@windriver.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
86229b68a2