core: mutex: mutex is abstract pull it from arch folder

This commit moves mutex* and wait_queue* from arch folder to core/kernel
to make it architecture-independent.

Signed-off-by: Marouene Boubakr

core: mutex: mutex is abstract pull it from arch folder

This commit moves mutex* and wait_queue* from arch folder to core/kernel
to make it architecture-independent.

Signed-off-by: Marouene Boubakri <marouene.boubakri@nxp.com>
Reviewed-by: Jens Wiklander <jens.wiklander@linaro.org>

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