Various TTM cleanups (v2)

[Felix Kuehling]

The series is Reviewed-by: Felix Kuehling <Felix.Kuehling at amd.com>

Regards,
  Felix


On 2018-01-29 08:55 AM, Tom St Denis wrote:
> Various TTM cleanups (mostly no functional changes).
>
> Notably patch #1 fixes a bug in the access_kmap() function.
>
> The rest are either coding style fixes or simplifications.
>
>
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