Updated doxygen documention.

Updated doxygen documention.

Change-Id: Ia996e490f8348c9cf9161d6d450cba066a17c0a3
Signed-off-by: morgolock <pablo.tello@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4540
Reviewed-by: SiCong Li <sicong.li@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
(cherry picked from commit 70b1eb8ca43a784afa49f9d6405fdb960184fab3)
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/4176
Tested-by: Georgios Pinitas <georgios.pinitas@arm.com>