Merge branch 'devlink-rate-limit-fixes'

Dmytro Linkin says:

====================
Fixes for devlink rate objects API

Patch #1 fixes not decreased refcount of parent node for destroyed leaf
object.

Patch #2 fixes incorect eswitch mode check.

Patch #3 protects list traversing with a lock.

====================

Signed-off-by: David S. Miller <davem@davemloft.net>