sycl: Add reorder to Q6_K mmvq implementation (ggml-org#13885)

* Add Reorder to Q6_K mmvq implementation

* Address PR comments: clean up comments

* Remove unused parameter after refactoring q4_k

* Adding inline to function and removing unnecessary reference to int

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Signed-off-by: nscipione <nicolo.scipione@codeplay.com>

Author: s-Nick