net/mlx5e: Factor out IPsec ASO update function

The ASO update is common operation which is going to be used in next
patch, so as a preparation, let's refactor the code for future reuse.

As part of this refactoring, not used function argument was removed too.

Link: https://lore.kernel.org/r/d04770b959822fed51c22c13e798f04d760a682e.1680162300.git.leonro@nvidia.com


Reviewed-by: Raed Salem <raeds@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>