error handling in of_dpa_cmd_add_acl()
Is this line reachable?
https://gitlab.com/qemu-project/qemu/-/blob/master/hw/net/rocker/rocker_of_dpa.c#L1783
1. while declaring in line 1692 err takes ROCKER_OK value
2. Calling of_dpa_cmd_add_acl() in line 1779 always returns ROCKER_OK to err too
3. ROCKER_OK is 0 by default
4. It seems that err changes nowhere in context of of_dpa_cmd_add_acl() function, except of point 2