[PATCH 4/4] powerpc: Cell timebase workaround

[Benjamin Herrenschmidt]

> The above is a bit obfuscated. Please make the MFTB() macro use the
> nested version of the feature definitions, and let the surrounding code
> use the base one. Otherwise it will be really easy to mix them up by
> mistake, there's no exposure at the time of MFTB() usage that it uses
> feature labels.

Yup, I was thinking about doing that at one point and it slipped out of
my mind. Thanks for reminding me :)

Cheers,
Ben.