kernel: bridge: backport two snooping related patches

kernel: bridge: backport two snooping related patches

With this patch the following two patches are backported:

* bridge: fix parsing of MLDv2 reports
* bridge: allow setting hash_max + multicast_router if interface is down

The former one is an important fix which got just applied to the net-tree
and is queued for stable. The latter is a patch which is needed to make
the hash_max and multicast_router attributes configurable through
netifd.

Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue>
SVN-Revision: 45783