GPU-DRM-TTM: Fine-tuning for several function implementations

[SF Markus Elfring]

> Additional to that I don't really see the point in renaming some of the jump labels,

I am suggesting changes for another collateral software evolution.


> if you call it "restart" or "lock_restart" doesn't make much difference.

Do other identifiers fit better to a specification from the document "CodingStyle"
like the following?

"…
Choose label names which say what the goto does or why the goto exists.
…"


Does this wording need any more adjustments?

Regards,
Markus