* Unified common functions tests due to preparation for adding cl_khr_fp16 support
* Renamed base structure, few cosmetic corrections
* Added corrections due to code review
* Removed comment separators
* Added review related corrections
To the best of my understanding, these occurrences of the
`-Wunused-but-set` warnings do not reveal any underlying issues, so we
can safely remove these variables. There are more occurrences of this
warning in other places (not touched by this commit) that require
further analysis.
Signed-off-by: Sven van Haastregt <sven.vanhaastregt@arm.com>