powerpc/tm: Reformat comments

[Michael Ellerman]

On Thu, 2018-09-27 at 05:05:15 UTC, Michael Neuling wrote:
> The comments in this file don't conform to the coding style so take
> them to "Comment Formatting Re-Education Camp"
> 
> Suggested-by: Michael "Camp Drill Sargent" Ellerman <mpe at ellerman.id.au>
> Signed-off-by: Michael Neuling <mikey at neuling.org>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/306b1c06172424d496656ae5b668eb

cheers