IB/ipoib: Remove ACL sysfs debug files

IB/ipoib: Remove ACL sysfs debug files

Currently, there are device attributes like add_acl which are writable and
can be used to add ACL in addition to using ioctl. The kernel needs to
parse a string from user space. While parsing IPv4 address is simple,
parsing IPv6 address is not. And it is error prone and can be a security
issue if not done right. Since those attributes are only used in a debug
kernel, it is advisable to remove those attributes instead of adding IPv6
support to them. The following attributes, add_acl, delete_acl, acl,
acl_instance, add_acl_instance and delete_acl_instance are removed. The
last four do not handle IP address. But to be consistent, they are also
removed.

Orabug: 25410192

Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com>
Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com>
Reviewed-by: Håkon Bugge <haakon.bugge@oracle.com>